Eugh, it's times like this that make me ashamed to be a PC gamer, with people flooding Steam with negative reviews with 0.2h of play time, "wurzt gam evarr"
Would you be ok with the game crashing and playing at 20fps? Would you give a positive review?
If I bought a game that wouldn't start, or was practically unplayable due to performance, I would feel it an obligation to warn others about it.