Slow speed

[fs30000]

I have a TPlink T3U Plus, compiled and installed the module, but the speeds are slow in AP mode. Am i missing something obvious?

My hostapd.conf file:

ctrl_interface=/var/run/hostapd
ctrl_interface_group=wheel
macaddr_acl=0
auth_algs=1
ignore_broadcast_ssid=0

driver=nl80211

interface=wlp0s21f0u2
hw_mode=a
channel=48
ssid=ap1
wmm_enabled=1

require_ht=1
ieee80211ac=1
ieee80211n=1
require_vht=1

vht_oper_chwidth=1
vht_oper_centr_freq_seg0_idx=157

bridge=br0