Right?
People think "Oh these two guys just fought about Kate!"
First of all, they never fought about her. And while they both had feelings for her, the whole trio's dynamic revolves around the fact that both Kate and Sawyer just want Jack's attention and he's too dense (or, ya know, neurodivergent) to notice either of them is flirting with him.
(To be fair, Sawyer himself doesn't realise he's flirting with him. But he is. Oh, he is.)
Imo, you don't understand Jack/Kate/Sawyer relationship if you don't acknowledge Jack as the apex of the love triangle. I know, I know, the show does its best to make you think that's Kate the apex but, really, it's Jack.
Everybody on that island is a little in love with Jack but Jack. Jack hates himself lol.