I did the very first link already which I have talked about on this thread about the youtube tutorial. This didnt really help, but I'm going to look at the second video maybe that will do something, Thank you :D
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Use WLAN Optimizer
https://wlan-optimizer.en.softonic.com/
Do you have another laptop/computer connected to the same network? if so can you try from there?
As you can see in the last screenshot 1 package has a huge delay, i'd like to know whether you have the same on another device. This would rule out if this is device specific or if it happens in the entire network.