I feel accomplished. After arguing with my family for a month or so, I finally solved the WiFi issues in my room! (We live in a flat. And the thick, concrete walls eat the signal super well)

I used to have 2 MBs downstream at most, with very common disconnects and general connection issues.

Now, just yesterday, I laid about 50 meters of ethernet cable all the way from my room to the other end of our house. Laid the cable along the top of our walls so that mom did not have to constantly whine how bad it looks.

Biggest issues were doors (Parents refuse to drill into the walls here, they tend to crumble a lot), but ended up running it under the door just tightly enough that the doors don't squeeze it in any way.

It works great! The cable is almost invisible, and now, my downstream is 30 MBps!

The only downside is that I used an old wifi router in my room that supports only 802.11b/g/n, not ac.