I haven't seen a single poster hating on Perisic -
All of the players I mentioned got hated in some form. Perišić at first that he went to Bayern and then that he didn't deserve the CL win because he wasn't a starter. After that it was because he didn't stay (management did fuck up by not giving him a new contract sooner) and went to Spurs, so every time Spurs didn't win, there were posts about how Perišić wasn't even all that good for Inter except for his last season here
Hakimi was getting the "not even that good" treatment as a coping mechanism by some. For us, he was an attacking RWB, for PSG he is a B2B RB haha. He had his good and his bad games, but he never really looked any worse than what was his average at Inter. I would say he has been one of the better players for them, even tho he is more suited to be a RWB.
Coutinho was getting the "he would never be good enough for Inter, we gave him enough chances"
After he left Liverpool to go to Barcelona, he got lambasted because he didn't perform (deservedly so), but the same people also acted like he didn't have at least 2,5 boss seasons at Liverpool. At a certain point, he and Suarez were too good for EPL.
Why Icardi got hated, we all know, but his contribution for us soon got downplayed. Sure, I also didn't like his ghost mode during games, that is why I prefer players like Lautaro or Kane. He fucked his own career and he would be an Inter legend if he stayed under the right conditions (I'm 75% sure in that assesment). Now just because he is in Galatasaray, suddenly he isn't Inter level anymore?
With Onana it's malice from some members. They just never liked him, maybe because he replaced our aging, beloved captain and that showed that there can be life after Handanović. I would love to have at least 7 clean sheets in every CL season. And that's after playing in a group with Bayern and Barcelona.
Well I could go on, but I won't.
Let me end on this - treasure the players we have. This is actually a good Inter era right now. Also good players can have bad games but they can still turn it around. Just look at Barella. He isn't a boss every game. So let's not throw hate at him if he ever leaves and doesn't perform there. Only what he did for us matters.