ulterno

You just went over 9000% instead!

fancy ASUS router doesn’t have any way

Maybe it's just the ATPC, that's why they thought they didn't need to add the setting.
Mine is a pretty old, cheap 2.4GHz only model from the days when 5GHz had just entered the market.

I remember having to fflush a couple of times.

Sha-ring is Ca-ring

Well, now you do!
I'll consider myself having done a good deed today :P

I would assume yours does have ATPC, specially if it is an 802.11ac or later standards compliant.

I don't have much space I roam around in and there's mobile internet for the mobile anyway.

It was completely unusable. Everyone was jamming everyone else.

The companies deserve all the flak they get in this case. They know it is congested because they are the ones who did it, but don't care to think about it.

The least they could do is to let the user change the settings, but "oooh nooo PICNIC!"
Ideally they should use a WiFi analyser while setting up the device and if there are too many APs of their own company, send a report to their nearby office so that it can be rectified.

I don't downvote my comments.

Unless someone proves my comment to be a bad one in a reply and I consider my comment to have been wrong. (That happened once on Reddit)

I remove the upvote so that when I open up my history, I don't feel weird with everything being blue. <- also, you would probably find my second reason in a previous comment somewhere else

just to power through the interference from other apartments

Yeah, it would have helped for your neighbours to have reduced their power a bit.

Also, if they have so many chickens, why don't they just get those to make more eggs?

Ahh right! Because they are Chlorinated!

Another chicken and egg problem.

I just keep it at the lowest power (20%) and am right now getting > -50dB (5 bars).
Of course, if you are doing it for the efficiency, you will also need to make sure that your receiver is not having a hard time with the low transmit power.

So, not caring, definitely works.