Is the Kate and immortal stuff weird, yes.But can people stop acting like he forced himself on her or abused his power.Kate even says she’s happier with him than Rex.He might be a 1000 years old but everyone is young to him.No one talks about omniman and Debbie when they’re age gap is similar.The way Kate said it they seem to be in a happy relationship and until proven otherwise or immortal does abuse his power there’s nothing wrong.

COMIC SPOILER- >!They get happily married,have kids and live a good life!<

Also the reason he’s so hard on the guardians is because he kind of needs to be, because compared to the old team they’re terrible and struggling. The guardians were the earths greatest team know they’re just about doing the job. If Cecil is worried you know there’s a problem.It’s not the best way but it is necessary.

Some say he’s the worst member on the team but may I remind you that Rudy the former leader took a clone body of his teammate, made a child version because the girl he liked was attracted to it. This is way more messed up.Also Rex cheated on eve for no reason and Kate has slept with two members of the team.Half the team is messed up.