Slow WIFI on AX3000

[thecatishere]

i have purchased RT-AX58U V2 and the WIFI is capped at 3 mbps. The PC connected via LAN is doing okay but the other devices are not. Changing between control channels, 2.4/5/6 ghz bands doesn't affect the problem. 

[thecatishere]

@MarkWood211. I'm using the default settings with latest Samsung android device and latest MacBook Pro.
I've tried both 2.4, 5GHz bands with and without 802.11ax, on 20, 40, 80 and 160 Hz channel widths on different channels
2. Yes It's updated
3. I've restarted them multiple times
4. I've used basically every channel available for 2.4 GHz and also a lot of them in 5Ghz.
5. I bought the router yesterday it is with the factory settings