Xiaomi Readmi Note 6 Pro slow internet via Wi-Fi mikrotik RB951G-2HnD, how to fix it?

Question

WiFi

Hello. I noticed that my phone has a slow Internet connection from wi-fi mikrotik RB951G-2HnD. Who faced this and how did you solve it?
Tried a bunch of settings. From other routers everything works without problems.

Moreover, Xiaomi Readmi Note 9 and Xiaomi Readmi Note 4 work perfectly, everything flies.

here is a screenshot of the settings https://skr.sh/sBL4vOoxojX?a