You certainly have a total right to be displeased. Send Apple feedback https://www.apple.com/feedback/ .
However, you should be reminded that Garage Band is free. Kind of disingenuous to complain too strenuously about a product with that much functionality that is provided by Apple free of charge. But go ahead and complain -- you should complain directly to Apple, however, these forums are mostly users helping other users resolve technical issues, this is not a technical issue.
FYI, I just went to my 2013 Macbook Air on Catalina and noticed that it does not have Garage Band in the Applications folder. I went to the App Store and it indicated that the latest version requires Big Sur, do I want the latest version compatible with Catalina. I said yes and it downloaded and installed Garage Band 10.3.5. This Macbook Air can go to Big Sur in fact but I decided not to do that at this time. Garage Band 10.3.5 has a lot of capability for a free program.
There is an expression, "don't look a gift horse in the mouth." I think you are looking at this gift horse in the mouth, maybe.