Internet problem?

Question

WiFi

Hello users of this forum, I would like to ask a question about my internet.
The fact is that the quality of my connection on this device is getting worse and worse, and on other devices it just flies, I can’t understand what is the problem of such a bad connection, if you can help please, I tried to reinstall Windows, when reinstalling everything goes ok and after a while the internet gets worse and so every time, I can't find the problem, HELP!!

Answer 1

I apologize for the grammatical errors, I wrote in a hurry, I didn’t notice!)