Massive internet connection problems

[Leak1337]

Hey,

My s23u has massive internet problems. https://www.directupload.net/file/d/7103/h8gwlwvo_jpg.htm

For comparison, my Poco f3. https://www.directupload.net/file/d/7103/fa7n6elp_jpg.htm

What could be the problem?

What I've already tried: 

Phone restarted

Network settings reset 

Set to WPA2 in the router 

[Joeeye]

A multitude of things, but my first guess is your router.

[Leak1337]

A setting? I've tried around but nothing has helped so far 

[Joeeye]

Do you have a phone case? Try testing it without it on if you do. This would indicate some obstruction to your WiFi antenna if it works fine.

[Leak1337]

No case

[Tourbillon De La Vie]

Restart the router too

[Leak1337]

Unfortunately it doesn't help either