In real life (no matter what hardware you use) you will generally get up to 1/2 the transfer speeds with regards to your link speeds.
As for your config, can you post an export from your capsman manager device? This provides more details to be able to help.
please see below, APs MAC address I replace with 'xxx':
[howard@SK-RouterOS] /caps-man> export
# sep/02/2020 18:34:46 by RouterOS 6.47.2
# software id = JPEQ-ZDET
#
# model = CCR1009-7G-1C-1S+
# serial number = 91500A426B08
/caps-man channel
add band=2ghz-g/n control-channel-width=20mhz frequency=2412 name=channel1-2.4
add band=5ghz-n/ac control-channel-width=20mhz extension-channel=XXXX \
frequency=5180 name=channel36-5
add band=2ghz-g/n control-channel-width=20mhz frequency=2437 name=channel6-2.4
add band=2ghz-g/n control-channel-width=20mhz frequency=2462 name=channel11-2.4
add band=2ghz-g/n control-channel-width=20mhz frequency=2422 name=channel3-2.4
add band=2ghz-g/n control-channel-width=20mhz frequency=2452 name=channel9-2.4
add band=5ghz-n/ac control-channel-width=20mhz extension-channel=XXXX \
frequency=5240 name=channel48-5
add band=5ghz-n/ac control-channel-width=20mhz extension-channel=XXXX \
frequency=5200 name=channel40-5
add band=5ghz-n/ac control-channel-width=20mhz extension-channel=XXXX \
frequency=5220 name=channel44-5
add band=5ghz-n/ac control-channel-width=20mhz frequency=5260 name=\
channel52-5-dfs
add band=5ghz-n/ac control-channel-width=20mhz frequency=5320 name=\
channel64-5-dfs
add band=5ghz-n/ac control-channel-width=20mhz frequency=5280 name=\
channel56-5-dfs
add band=5ghz-n/ac control-channel-width=20mhz frequency=5300 name=\
channel60-5-dfs
add band=2ghz-g/n control-channel-width=20mhz extension-channel=disabled name=\
channel2.4
add band=5ghz-n/ac control-channel-width=20mhz extension-channel=XXXX name=\
channel5
/caps-man security
add authentication-types=wpa-psk,wpa2-psk encryption=aes-ccm group-encryption=\
aes-ccm name=security1 passphrase=SuperK2018
/caps-man access-list
add action=accept allow-signal-out-of-range=10s disabled=no signal-range=\
-70..120 ssid-regexp=""
add action=reject allow-signal-out-of-range=10s comment=\
"drop low signal devices" disabled=no signal-range=-120..-71 ssid-regexp=""
/caps-man configuration
add channel=channel1-2.4 datapath=datapath1 mode=ap name=cfg1-2.4 security=\
security1 ssid=wintaiwoo2.4
add channel=channel36-5 datapath=datapath1 mode=ap name=cfg36-5 security=\
security1 ssid=wintaiwoo5
add channel=channel3-2.4 datapath=datapath1 mode=ap name=cfg3-2.4 security=\
security1 ssid=wintaiwoo2.4
add channel=channel40-5 datapath=datapath1 mode=ap name=cfg40-5 security=\
security1 ssid=wintaiwoo5
add channel=channel6-2.4 datapath=datapath1 name=cfg6-2.4 security=security1 \
ssid=wintaiwoo2.4
add channel=channel44-5 datapath=datapath1 mode=ap name=cfg44-5 security=\
security1 ssid=wintaiwoo5
add channel=channel9-2.4 datapath=datapath1 name=cfg9-2.4 security=security1 \
ssid=wintaiwoo2.4
add channel=channel48-5 datapath=datapath1 mode=ap name=cfg48-5 security=\
security1 ssid=wintaiwoo5
add channel=channel52-5-dfs datapath=datapath1 mode=ap name=cfg52-5 security=\
security1 ssid=wintaiwoo5
add channel=channel56-5-dfs datapath=datapath1 mode=ap name=cfg56-5 security=\
security1 ssid=wintaiwoo5
add channel=channel11-2.4 datapath=datapath1 mode=ap name=cfg11-2.4 security=\
security1 ssid=wintaiwoo2.4
add channel=channel2.4 country=china datapath=datapath1 mode=ap name=cfg2.4 \
security=security1 ssid=wintaiwoo2.4
add channel=channel5 country=china datapath=datapath1 mode=ap name=cfg5 \
security=security1 ssid=wintaiwoo5
/caps-man datapath
add bridge=bridge1-192.168.1.0 client-to-client-forwarding=yes name=datapath1
/caps-man interface
add comment="Big meeting room" configuration=cfg2.4 disabled=no l2mtu=1600 \
mac-address=CC:2D:E0:xxx master-interface=none name=cap1-2.4g \
radio-mac=CC:2D:E0:xxx radio-name=CC2DE0Cxxx
add configuration=cfg5 disabled=no l2mtu=1600 mac-address=CC:2D:E0:xxx \
master-interface=none name=cap1-5g radio-mac=CC:2D:E0:xxx radio-name=\
CC2DE0Cxxx
add comment=Boss configuration=cfg2.4 disabled=no l2mtu=1600 mac-address=\
CC:2D:E0:xxx master-interface=none name=cap2-2.4g radio-mac=\
CC:2D:E0:xxx radio-name=CC2DE0xxx
add configuration=cfg5 disabled=no l2mtu=1600 mac-address=CC:2D:E0:xxx \
master-interface=none name=cap2-5g radio-mac=CC:2D:E0:xxx radio-name=\
CC2DE0xxx
add comment=Jake configuration=cfg2.4 disabled=no l2mtu=1600 mac-address=\
74:4D:28:xxx master-interface=none name=cap3-2.4g radio-mac=\
74:4D:28:xxx radio-name=744D28xxx
add configuration=cfg5 disabled=no l2mtu=1600 mac-address=74:4D:28:xxx \
master-interface=none name=cap3-5g radio-mac=74:4D:28:xxx radio-name=\
744D28xxx
add comment=Chunyang configuration=cfg2.4 disabled=no l2mtu=1600 mac-address=\
74:4D:28:xxx master-interface=none name=cap4-2.4g radio-mac=\
74:4D:28:xxx radio-name=744D28xxx
add configuration=cfg5 disabled=no l2mtu=1600 mac-address=74:4D:28xxx \
master-interface=none name=cap4-5g radio-mac=74:4D:28:xxx0 radio-name=\
744D28xxx
add comment=Irene configuration=cfg2.4 disabled=no l2mtu=1600 mac-address=\
74:4D:28:xxx master-interface=none name=cap5-2.4g radio-mac=\
74:4D:28:xxx radio-name=744D28xxx
add configuration=cfg5 disabled=no l2mtu=1600 mac-address=74:4D:xxx \
master-interface=none name=cap5-5g radio-mac=74:4D:28:xxx radio-name=\
744D28xxx
/caps-man manager
set enabled=yes package-path=/ap-upgrade upgrade-policy=suggest-same-version
/caps-man manager interface
set [ find default=yes ] forbid=yes
add disabled=no interface=bridge1-192.168.1.0
/caps-man provisioning
add action=create-enabled disabled=yes master-configuration=cfg1-2.4
add action=create-enabled disabled=yes master-configuration=cfg36-5
add action=create-enabled disabled=yes master-configuration=cfg3-2.4
add action=create-enabled disabled=yes master-configuration=cfg40-5
add action=create-enabled disabled=yes master-configuration=cfg6-2.4
add action=create-enabled disabled=yes master-configuration=cfg44-5
add action=create-enabled disabled=yes master-configuration=cfg9-2.4
add action=create-enabled disabled=yes master-configuration=cfg48-5
add action=create-enabled disabled=yes master-configuration=cfg11-2.4
add action=create-enabled disabled=yes master-configuration=cfg52-5
add action=create-enabled master-configuration=cfg2.4 name-prefix=MikroTik
add action=create-enabled master-configuration=cfg5 name-prefix=MikroTik