Obligatory comment that recommends Framework, as they support linux out of the box.
Aside from that, more important than the brand is the laptop model. Some parts (like fingerprint, camera or touchpad) may not work with linux, and that depends on the model, not the brand. So I'd suggest searching for the model you're interested in, and then combining that search with Arch (usually has the latest - but sometimes unstable - packages, so you'll see what's probably possible), Debian (wide user base, but older packages, so you'll see what definitely works) and then EndeavourOS, to see any issues that may come up that are really relevant for you.
Honestly asking, who gave them horrible reviews? Have seen some middling ones and support has some negative threads in the forum, but nothing really bad?
I've watched and read a lot of reviews. I don't think any of them were horrible. There were legitimate criticisms like the keyboard flex and the lid flex, but most of what I've seen that's almost ubiquitous is the price per performance worse than other makers. Its fair, but I also think it's a fair tradeoff for modularity and reparability.
As a Dell user, not very happy with mine. Uneven backlight/bleeding, poor build quality (screen glass misaligned with the bezels, keyboard keys coming out which aren't covered under warranty according to Dell, parts of the keyboard failing, trackpad click failing - the trackpad is integrated into the chassis so that had to be replaced) and it's quite overpriced.
That said, some models are Ubuntu certified and get firmware updates without Windows Update
I have never seen a negative review that was not price or shipping/doa. They cost about 30% more, and that may or may not be worth it to you. If you want proper Linux support or working power states in windows; it is likely worth it.