But even those numbers cannot be compared since RT audience score and critic scores are calculated completely differently. Also if you read some of the negative audience reviews many of them are clearly written after the final movie of the trilogy has been released and are judging this movie in the negative light of that whole experience.
Now it may very well be that GP's statement is wrong, but the numbers you are quoting can't really be used as evidence either way.
If these numbers are as problematic as you claim, it wouldn't explain why they don't hold true for Rise of Skywalker which fans overwhelmingly preferred to critics.
Now that I think about it: it's likely that's the film that GP had in mind.
Now it may very well be that GP's statement is wrong, but the numbers you are quoting can't really be used as evidence either way.