Ugh, I'm biased and so I don't really want to answer but will try. According the VLC, the reason for them becoming so terrible as a media player is because they can't update their app. Now as you and me can both clearly see, the latest version available is the version that is in the app store and on F-Droid. If they were crying about not being able to update and had a version or two that they were unable to upload, it would make sense. But nope, they have nothing beyond what they have. Add to that, if you look at their forums, lots of people have been raising issues. One very handsome man even posted this in October

VLC was once the best in class. Not only was it a great piece of legacy software, the Android team were so passionate that they took that reputation and all the expectations that go along with it and exceeded it.

But as time has gone on, it's just started to languish. If you attempt to rewind a few too many times, the video freezes and you get audio. You can't play a folder on a NAS without creating a playlist. You play a folder locally without VLC losing its place. Every time the screen goes off, it needs to scan the device anew. And despite being at the forefront of Holo Design and Material Design 1, it's yet to implement Material You.

It feels like VLC for Android has been forgotten...

To which their response was to ask for logs, despite the fact that the issues can be reproduced on every device I've ever tried.