1. Sharing is super-confusing. I was trying to organize things for my mom, as well for my wife and I. And you have to create these "organizations". And they makes things really confusing for a variety of reasons. They are a different pricing/SKU. And the UX around them is not good. It's not clear where things are being created a lot of the time, and who may or may not have access. It just was a really bad experience.
2. It was outrageously slow for me. I use Enpass otherwise, and it comes up right away, and searching is relatively fast. But Bitwarden always had this delay. And it was a huge pain point because it wasn't clear immediately if there were just no results, or if I just had to wait a few seconds. And sometimes things would pop up unexpectedly.
So I've continued using Enpass. It has _by far_ been my favorite password manager. It's no open source, but it uses Sqlite and SqlCipher under-the-hood, and I have full control over where it syncs my data to. Sharing is still a problem (mainly because of the architecture decisions - there is no "central server"), but everything else is so great that I'm fine making that tradeoff.