For me it's the reason I stopped playing. I don't mind bugs, lack of content, quest issues, ...
But really not even a few companions that you can rely on or work with. If you put them in a party and want to upgrade their gear it's a hassle. You are never really sure of their potential. Their perks are a mess, and so on.
I know it's not WB annymore but I miss Ymira, Jeremus, klethi, ....
I hope they have time to work on companion issues in the near future
Maybe my expectations were to high?