I don’t think cutting Han’s Jealousy in ROTJ would solve your issue. The problematic scenes are in ESB (the kissing scenes between Luke and Leia). These are what create a “Love triangle” and although they get a bad rep these days, there is nothing wrong with love triangle if they are done right. What messes it up in ROTJ is when we find out that Luke and Leia are twins, at which point we stop being conflicted with whether we want Leia to end up with Luke or Han and instead just think of Lukeia as being the Grossest thing the in the galaxy (aside of from that ship name).
But obviously removing the whole “she is your sister” thing isn’t feasible and as ESBR is finished, the problem scenes from that, are locked in place. This leaves us with Han’s character, who already has a criminally small role in this film. From his perspective he likes Leia and knows she like him too, but he also knows Luke likes her and that they “have a connection”. And as we can’t cut the ESB scenes, he knows they kissed at least once. Beyond that he doesn’t know whats happened for the last however long he was frozen, only that they seem even closer than before and anyway the only really jealous bit we get (other than a few moments of excellently subtle acting, when ever he sees them showing mutual affection) is at the end, just before he finds out they are siblings.
Overall I would expect someone like Han to get a bit jealous. If he thought his best friend was getting with one of the few women he has ever had actual feeling for, dispite her having shown she likes both of them, he was ulitametly willing to step out of the way, showing how he has grown to care for both of them. Removing his jealousy arch would leave his character with litterally nothing in ROTJ and make the already farely forgotten scenes from ESB (forgotten as in the movie/characters seem to forget them as Luke doesn’t indictate he has a problem with kissing his sister at all, when he gets the news) seem even less consequential and more awkward.
So idk if its really a love triangle, I would say it was in ESB but that is set in stone as far as the Revisited series is concerned and we are only dealing with the fallout form that in ROTJ, which is needed given all the reasons above. There’s my two cents.