[Maxatar]

Any form of media can be criticized, that's the nature of it... but RDR 2 is widely considered to be among the best games ever made.

Is there going to be someone out there who doesn't like it? Sure, take absolutely any game whatsoever and there's someone out there who will tell you it's not good... but by any reasonable measure: critical reception, awards, lasting cultural impact, influence on future games, it's almost across the board on the positive end of the spectrum. You're of course free to dislike it, but claiming it to be a "serious letdown" treats your singular point of view as if it were a consensus, when the actual consensus is overwhelmingly the opposite.