I have a bunch of old shovelware games I want to get rid of from over the years. I don't want to delete my account, because I want to keep some of the games, but is there a way to just be able to remove games?

...Yes. There's a Delete button in the lower right when you edit your project. But if they already have buyers, you'll have to contact support and give a reason.

No, I'm not talking about games I made, I'm talking about games in my library.

You can't un-buy games.

You can only un-rate a game.

Use collections to organize your library, instead of the Things you own.

I for one would also welcome an option to at least hide purchases. You can display the games you own publicy, but maybe you do not want to show the world the purchases you were unhappy about. There is collections, but displaying it on your profile is bragging and bragging works better, if the list has the official sign that you supported a game.