Bad … WiFi! 
Edit: I’m just trying to figure out what 200 dbm is in watts. I get 1E+17 which is Exawatts. Too many different things. I figure it’s about 25 watts? I don’t know!
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It’s all good fun ain’t it? 
The important thing is how much current it pulls eg Amps. Anything else is not that important. If you understand current then you are pretty much safe. Call me mad, it won’t be the first time.
that is why I suggested to try some, live cd to confirm or rule out a broken wifi adaptor
That’s probably a bug and it’s reporting mW instead of dBm xD
EDIT : the sun is at 296 dBm xD
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The router could be a problem of course.
They should be the same, surely?
Unless, of course, the Gnome applet isn’t using network manager for the connection.
If nmcli is showing full bars it isn’t network manager or the WiFi causing problems.
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Well I’m trying to understand it in something that i know a little about. Watts! But it doesn’t tell you watts. I think you are right that it is reporting too high as i looked up the specs for this card and it is running on 11ac so it should be around 51 - 54dbm according to the specs.
https://www.tp-link.com/ca/home-networking/pci-adapter/archer-t6e/#specifications
Edit: Not sure if that is just the setting it’s set for or the actual reporting of it? Even though it may be using less? 
Watts does not mean so much. Amps mean the energy it is pulling from your system, Please read up on electricity. They are all important but each relates to the other.
Akshchually, amps measure the current, which is the amount of electric charge (i.e. number of electrons) that passes through a cross section of a conductor in a given time (specifically, 1 amp = 1 coulomb/second).
Watts measure the power, which is the amount of energy that is added to a system in a given time, or alternatively, the energy output of a system in a given time (specifically, 1 watt = 1 joule/second).
Now, power and current are related. For direct current, power is a product of current and voltage. With alternating current, you also have a so-called power factor, which comes from the fact one has to use a root mean square of power and current in the equation.
Yeah yeah of course! I might be mad but I ain’t thick! 
Plus as an added bonus, alternating current can also have multiple phases. Such as 480 VAC three phase.
Pudge
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Thanks everyone for helping me. After all day troubleshooting, with your help, i got it fixed.
Problem wasn’t in drivers, because wl and wl-dkms didn’t made any visible differences, ncmli showed full bar. Hardware is also working perfectly tested from other distros and systems.
After turning off power saving for wifi from gnome settings, wifi started working normally. Still, gnome applet shows like only one bar, but in actual settings>network it’s normal. Latency is gone, and now everything is working as it is supposed to work.
Again, thanks everyone for helping me.
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Ya it’s funny how one little power setting can have such an impact. 
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Not California compliant tho xD
Honestly, didn’t even bother to look for that at beginning. My thoughts where that it shouldn’t have impact in any noticeable way.
Thanks for help and friendly communication
This happens a bit with WiFi chips that have bluetooth on them together also.