This is a totally uninformed question. Are you sure the bad quality from the discs is the fault of the discs rather than your blu-ray reader? I'm assuming you've had good quality from the reader for other discs??
It's a digital signal, either it reads and works or it doesn't. You don't lose quality because a "bad" player.
That's oversimplifying things. Players and TVs can and do apply their own processing and then there are sometimes parts (e.g. Dolby Vision) that are just ignored by non-supporting players.