A lot of people are giving the Nintendo Switch port of MK1 a lot of flak.
I don't see a huge problem with the graphical difference, but that's because I don't consider the Nintendo Switch an actual console system. I consider it a portable system with a TV out. Like a more modern Super Game Boy.
So yeah, it looks terrible on an HDTV compared to a PS5. But when you're playing on a 6 inch screen on the bus during your morning commute, it probably looks fine for a portable version of the game.