my wifi works great, so when you say crappy wifi, is this a specific issue on a specific model? I wouldn't bother, but there are trolls who just make random stupid complaints that are just trying to create a false narrative. I'm not saying you are one at all, but your comment would be significantly more meaningful with more information. I have a 2014 MBP 15, and have zero issues. We have google fiber and the latest mesh routers. wifi was crappy until the routers were upgraded, but it was crappy for Windows and MAC devices, so clearly not a BigSur issueMaybe they should work on major bug like crappy WiFi?
there are in fact a lot of reason for "crappy wifi" that have nothing to do with BigSur, such as interference from radio waves, overcrowded channels, too many devices, outdated and overwhelmed routers (and that is assuming you already know about distance and obstacles, because I am also assuming that you are saying that wifi on BigSur is not up to standard and you don't just have crappy wifi for other reasons completely).