what i understand:
1) this is all his thinking lol because he "insisted" the marriage. but even when he knows taeyon wouldn’t feel pressured or even threatened by him, he just thinks it was an “oh well okay” decision from taeyon. its more of a “he did it because i said it so = forced him” kind of thinking. this guy jaeha istg…
2) first, for now i think it’s safe to say it’s for real. like it makes sense lol. second, i think it’s because every time he tried to help, taeyon got angry at him. so “if i’m not next to him he can’t see me” ahh thought. so now he’s doing everything to take down yushin far from taeyon for him not to stop jaeha :/
3) miscommunication ahh couple but make it worst because they both are stubborn as fuck
hope this helps a little (⌒▽⌒)
Kinda spoilers imo
I remember mtl'ing the novel a little while back nd wouldn't say this is horribly written, its just the mc seems abit autistic lol and alot of the times mc is over analysing stuff or jusg having a mental breakdown in his head lol , so yeah alot of you guys might find his thinking process a little confusing in the manhwa , since its very difficult to translate all his mind games to art , nd also as far as i read even though it was definitely clear ml was into the mc , i would say ml definitely gave an eery vibe nd also not to mention dude also hide aton of stuff from the mc which makes his overthinking speed run lol.
1.Mc thinks ml doesn't like him and was forced to marry him bc from wht i remember idk if it was still said in the manhwa bc i kinda skipped a few chs lol but anyways mls mom had a really bad experience from mc's family so he thinks tht ml wants the revenge and is forced to marry him bc of tht , nd this is also one reason mc thinks ml dislikes him. Bfr knowing the moms part mc thought ml was forced to marry him bc alpha x alpha marriage is pretty looked down upon in tht society,so he thought ml was insisted upon to do the marriage for connections or the ml had something to gain from this
2. He does have ulterior motives lol. He wants the revenge on mcs family nd he doesn't say he wants to help the ml bv he knows ml won't accept it and they are still in an awkward state regards to communication nd mc is literally closed off so he just wants to do whtvr he can to help the ml from his side.
3. I dont think there is miscommunication,it mostly no communication lmao

Here are a few things I simply do not understand
1) why does jaeha keep saying he forced the marriage, when in reality, taegon always had the option to just reject? is this a power thing?? it's not like any threats were involved?? why is jaeha so dense?? like i dont get it
2) given the fact jaeha realized taegon approached him (is this fr (cuz sumin also said it was) or is this purely theorized by jaeha) for ulterior motives (revenge on yushin), why doesn't he just say he will help
3) jaeha literally just doesnt ever communicate or listen to taegon lwk... also taegon doesnt even properly word things either... like both are just so ass at ts bro
maybe my confusion just stems from this manhwa / characters being poorly written, but srs... whaaaaaat