Because you've been using VLC for so long you don't even realize that your "works fine" is actually shit by anyone's else standards because they are used to better playback than what VLC gives.
Or because you're a troll. Posting copypasta anyway.
- Absolutely horrible subtitle rendering
- Horrible seeking
- Audiorape while seeking
- No instant play/pause
- Slowdown while seeking for no reason
- Embedded subtitles are not on by default even if they were set to "forced" in the file
- Subtitles lag a mile behind when seeking
- Ridiculously shitty downscaling