hmm, that is the TV, it doesn't have a gigabit network card. I did manage to get a proper speedtest on the PC after disabling QoS and rebooting.
But I was also having some troubles before I did the test.
It started with me half DC from everything. By "Half DC" I mean, getting DCd from a game, and also voip and my screen share on discord died all ta the same time. But I didn't DC from Steam or discord. Kinda hard to explain, I was online, but I couldn't hear or talk to anyone in the channel, or load any webpages etc. it was weird. A reboot on the router fixed it.