Lots of squabbling on this forum atm, I guess because of the lack of content Carrie is putting out lol.
What I will say is that I assume the people saying a ten year age gap is fine are quite young themselves. When I was 21 I was briefly in a relationship with a 30 year old and I was very quick to be like "age doesn't matter if we're both of consenting age, I'm very mature" etc. But now I'm 30 I look at 21 y/os and they seriously look like children to me so I do think it's gross to be leering over them.
Anyway, like someone said, I think the ick is more that they just broke up and he's out liking photos (having not at all publicly acknowledged the end of a very long and public relationship). Before I get swarmed by people being like "they're single he can do what he wants!!!!" You really saying that if your partner of 5 years broke up with you and then started liking photos of attractive young women days later you wouldn't find it upsetting and a bit sleazy? I'm not saying he shouldn't be doing it I'm just saying it's a bit creepy, especially for someone who is trying to put out an image of being a squeaky clean Disney musical star!