The problem with Dalton's passer rating from PFF is that his rating is higher than Joe Burrow's, Jalen Hurts', and Josh Allen's passer ratings, when the usual numbers (TDs, INTs, yards per game, completion average, 1st downs) don't reflect that.
Hold up you didn't say PFF passer grade, you said passer rating. His passer rating is solid, even comparable to the other guys on the list. You can just say you don't like him without mincing words.