For BB19 I 100% agree. However, for BB18 the man was absolutely robbed. Nicole did not deserve to win that season at all, and the women in the jury even admitted afterwards that they voted for Nicole simply for the fact that she is a woman and not based on her gameplay. Both Da'Vonne and Natalie admitted as such, and you can bet that Bridgette's reasoning was the same, too, despite not admitting it in an interview.
If Paul wins BB18, like he should have, we very likely do not see him in BB19 and that season probably goes a lot better than it did with Paul in the house controlling everyone.
Well obviously they weren't going to insert Paul into the game only to have him evicted in week 1. They 100% knew that at least SOME houseguests would target him, and that's exactly what Cody tried to do.
That said, it's not like production helped the guy the entire season. Did Paul have an advantage with the three-week protection? Sure did. But he was also put at a HUGE disadvantage walking into that house with almost every houseguest knowing who he was, his personality, and how he plays. None of the other houseguests knew anything about each other. So it's a catch-22.