I generally hate love triangles.
Two k-dramas that I watched fairly recently had the female lead shut down the love triangle really straightforwardly and I kind of loved it. In Where the Stars Land she tells the second lead to choose - either you're my friend .... and just really upfront about liking the other guy.
Same thing sort of happens in Your Honor too where she's really upfront with her friend that has the crush on her (I can't entirely remember how the scene went now but she basically breaks off their friendship because of his behaviour and I remember thinking it was awesome)
Temperature of Love sort of does this kind of but the second lead was so persistent that it was really off putting and I dropped it (I think there were other reasons besides that but it was definitely a factor).
So what I'm hoping to find are similarly straightforward female leads who make efforts to nip love triangles in the bud.