That's surprising to hear. Netflix has always been a step above, Hulu is decently behind. The rest are pretty rough from my perspective, but slowly getting better over time. Amazon was definitely miserable to use for a long time and I don't think had anything but a basic "fast-forward/rewind" functionality with no thumbnails for quite a while.
The Peacock app and streaming has been hit or miss on plenty of occasions.
I think the worse is the Disney app that makes it difficult to just replay a movie that's already been watched. It likes to resume at the end of the credits of the episode you want to watch rather than realize I want to watch the whole episode not just the final 10 seconds of credits. Or that switching between an episode when watching something from your "Previously Watched" list means finding the series on an entirely separate list in the UI.