No offence but that’s absolute bollocks. Loads of ps1 multi platform games were horrid on n64, and if you’re into RPGs, platformers, and horror games then the ps1 is a goldmine.
MGS, Silent Hill, Resident Evil 1-3, Final Fantasy 7-9, Suikoden 2, Breath of Fire 4, Parasite Eve, Tony Hawks, Spyro, Ridge Racer, Ape Escape, Grandia, Policenauts, Tekken 3, Wipeout 3, Valkyrie Profile, Klonoa, Vagrant Story… the list goes on.
Sure there’s a lot of shit on it too. But I’m always finding new stuff to play on PS1 that kinda pushes games in odd new ways at the time and hold up. But again, mostly RPGs and proto-cinematic adventure games.