Sorry, I just don't think it's the hardware.
The most obvious thing still seems to be your ISP or your router - do more testing with different OS - it's even possible that something "sees" that you're using "a suspicious OS" and throttles you because of that.

You need to do more tests when throttled, go through this thread one more time, there's a LOT you haven't tried yet, you're just tunneling in on the hardware/driver thing.

A simple 'ping 8.8.8.8' will already tell you something.

Also test wired.

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Yes, I will do the test. But at the moment, I just enjoy that I can finally upload everything and use my computer normally again after a month full of frustration and problem searching.

If that were the case, then I should be able to connect to another ISP or another router when the internet breaks. But in the video you can see, at the beginning I have around 20 routers in my proximity. Some from the same house/ISP, some from the neighbors.
After the internet breaks, it's all gone. The modem doesn't find any other ISP/router to connect to. I have to restart to get online again. Thus I am quite sure that it's not an ISP/router problem (and also I used both the whole year without problems).

I downloaded so many OS already. I think the reason why it doesn't happen with Windows 10 is that Windows 10 might throttle the speed already? At least I read something about that somewhere.

I could test this MiniPC at another location with a different IPS/router. And also I could test some Linux USB distros on another computer. Though the problems is more or less solves, over the thread I became very curious what causes this problem and why. It's a really strange problem, and with Google I can't find anybody else having the same issue.

Sorry, but is there a reason you just ignored the questions asked?? Again:

• What version of Manjaro?
• What brand/model of wifi adapter are you using?
• What kind of hardware is this adapter in?
• Do you have Manjaro INSTALLED or are you running a 'live' version from USB?
• Have you tried a wired connection yet?

Saying you "downloaded so many OS" doesn't tell us anything. You now mention it's a minipc...again, not telling us brand/model/anything about it. You say you've used your neighbors connection...does your neighbor have the same ISP? And does your neighbor have a cable you can borrow, since that seems to be a sticking point?

I see.
And I'll assume you can consistently reproduce that across all Linux distros and different browser-based upload services, but NOT on Windows running on the same machine?

Still, answer what was asked, bith from myself and TB0ne.

Also, you need to learn looking at logs. We haven't seen nearly enough. journalctl, dmesg...

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