I've tried it and run into what feels like the same problem. I've only ever kept one deck built by someone else, and I very frequently edit and delete cards from it. It's still my only Anki deck that I don't really enjoy spending time on - it feels more stressful. And for me, the process of creating the cards is definitely one of the most valuable components of the procedure. That said, I still haven't got rid of that deck, and I'll post a few of my decks that I think could be somewhat generally applicable in this thread in case anyone else wants to use them.