I have never found this to be the case at POP. I've never had an issue finding a seat during multiple stays of 8 or more nights. I've been at all times of the day and service has also been excellent each time. It can get busy but never to the extreme you've described.
No its true. You may be able to get a seat....usually not clean, but the lines are ridiculous. Pizza after 7pm takes an hour or more. Just to order you have 100 people in front of you. So select seating and super huge lines. Pop is horrible for their food court.