I’m sorry but you can’t be serious, Ian was aware of Melissa’s feeling yet kept toying with them he’s an absolute dick just cause he shows a little kindness doesn’t mean that makes up for everything Ian is the definition of toxic masculinity
We also have to remember that this is the world of a story (in Melissa's old world). Ian's personality is the logical conclusion of the trope he's assigned, especially since the writer wasn't all that great at fleshing out tropes (as Melissa points out during her conflict with peacock).
Also, thats not toxic masculinity. Toxic masculinity is not "I literally dont care about your feelings." Jake is probably closer to toxic masculinity (masculine-coded violence as the ultimate power. Weakness in violence isn't tolerated, thus devaluing any non-violent work which has been historically feminie-coded. Still not a one-to-one comparison tho). Ian's just a dick.
That said, I'm also excited to see where they take his character. It's more fun to watch a pitiable character grow than to be written out with one note. The author has taken great care in order to deconstruct the typical male lead tropes that women drool over. It wouldn't suprise me if they intended to build them back up using genuinely growth and self-reflection.
I kinda pity the crown prince. Yeah, he sucked but he was never really bad.. just a boy who wants to play around and be free. That's not an excuse for his behavior but it is understandable. I'm in for a redemption arc with the crown prince.