Trump polls about 35% among Republicans. That means 65% of Republicans do not like him, or at least like so one else better. Yes, I would say most Americans would say Trump is not likable. He is a jerk.
As for your contention that the size of crowds indicate likability - did you say the say the same thing about Obama in 2008?
Actually, you are just a blinkered, benighted little nothing of a nobody jerk, whose hatred and biases have blinded you to reality.