What’s wrong with the romance between Han and Leia? Their back and forth banter is one of the oft-cited strengths of the film, and I agree. Their chemistry on screen is really fun and engaging.
It’s basically the “boy sexually harasses girl until she gives in” storyline.
And when she finally gives in, it’s at the worst moment: they should all be working hard to fix the Falcon’s hyperdrive to escape the Empire and Han has no better idea than to go bothering her to get his kiss.
But it’s definitely a problematic part of Empire IMO.
It hasn’t aged well that’s for sure. In fact, Harrison Ford movies from the eighties haven’t aged well, as explained in this video: Predatory Romance in Harrison Ford Movies