People report "problems" with every single major and minor point release of the OS. Literally - every one. It's the same as being able to find, without exception, bad reviews on every product sold online.
I've been using Catalina full time since 10.15.1. That had more to do with waiting for the third party apps I need to become fully compatible than anything else.
Are there still problems with it? Yes. And there are still problems with Mojave, High Sierra, Sierra, Mavericks, Yosemite, Mountain Lion, you get the idea. Software this complex will never, ever be perfect.
Being self-employed, my Mac is my income. I do not experiment with it. With every major OS release, it gets installed to a new, blank partition, along will all of the third party software I use. That allows me to take my time setting up the entire OS clean. But much more importantly, it allows me to test for compatibility before I jump in. In the meantime, I can keep using the previous OS where I know things work.