Agreed, bundles are nightmarish to navigate. at least now games you bought there say you have it when you look on the store page for the game, but you need to basically know the name. which feels ridiculous. Even just giving an official way to export a spreadsheet of a library would be something. People who haven't bought the bundles but have bought hundreds of games over their years on itchio have complained about similar, I'm sure
Yeah, I have a ton of stuff in my library, and while a lot of it is from bundles (because I actually downloaded and tried the games instead of just ignoring them), a lot of it isn't. Even if you removed all of the bundles from my library, I would still have too many items to manually search.
My "solution" is to download all the games I own locally and put them in different subdirectories. Obviously not an ideal solution - I'm going to miss out on all updates, and systematically downloading and labeling everything takes time - but at least I don't have games disappearing into the black void of my library where I am never going to find them again.