No offense, but did you not read what I wrote? Edit: Sorry, that was rude by me. They had removed the game in the past from Steam and the Linux support. I think years later they added Linux support again, but I already moved on. While we seem to be able to play through Steam, the Epic Games Launcher still runs in the background and an Epic account is needed too (I think, is that true?). And no one can purchase it on Steam anymore.
They give you lot of reasons to. For me it was a personal thing when I really started to hate Epic Games. 2019 Epic purchased the studio of Rocket League, when the game was in a hype phase and I played and enjoyed it very much on my Linux system. Shortly after they removed the Linux support for the game and then they also removed it from Steam as well. Due to an update of the game it was no longer viable to support it on Linux they said.
This really really bugged me on a personal level. Today I think the game is playable on Linux, I don’t know exactly. But it requires Epic Games Launcher and probably account on them. To me the game is dead. And Epic killed it (for me).
When I say you need Epic Games launcher, then I don’t mean you have to install it yourself. Usually these launchers (like Ubisoft or Rockstar) are installing it in the background and require additional resources. As said I’m not sure if this is true for the Steam version here too. If you don’t play on Linux, then you didn’t have the Linux issues then I guess. That was my main complaint, as the they took away the native Linux version and made it for months or longer unplayable for me. And that was a time when I had a lot of fun before Epic ruined it for me. If it worked for you the whole time, then good for you.