I feel taeju's character is realistic. We have to take into account that this is an omegaverse and their pheromones and hormones and all that shit sometimes alters their actions (if you don't like that concept, don't read omegaverses. Or at least this one because like it or not, this is the author's take on it) taeju is literally a gangster that is accustoming to getting what he wants. He never seemed to have had love before and just went through life fucking around to sate his needs. He was rich and handsome and because of that quite frankly because of that he was spoilt getting everything he wants. He didn't have to think twice about anything and just went through life doing what he wanted.
Then euihyun arrives. At first he thought of him as just a pawn he can play around with as he's accustomed to doing but he realizes that it's different this time. He's genuinely beginning to have feelings for euihyun. He's not just attracted by pheromones, this isnt just because euihyun is an omega and he's an alpha. He genuinely has feelings for him. We see him get more jealous/possessive/clingy/needy to euihyun like a territorial animal (if you read enough omegaverses you'll usually see those feelings get heightened when feelings get involved). He realizes he doesn't just want him as a pawn, he genuinely wants HIM. This realization finally hits clear to him and for the first time in his life he has something to fight for, something to work towards and be hopeful for. And we can see how he's genuinely trying to work towards that. We can already see how he doesn't only see euihyun as an omega at his will anymore. But as someone he truly cares for and wants to make happy. And we need to remember he's young too. He was just a spoilt kid at the beginning of this but he's maturing and he really is trying to help and care for euihyun. Taeju's realistic in my eye. From someone who had no care in the world, just living life through their instincts (as an alpha) to someone who can see past all of that and willing to suppress those urges (i'm hoping you all realize that) and work on putting it second behind euihyun and his happiness.
I didn't expect to rant so much but I think his character is well written and his progression is realistic
Taeju refering to himself as Euihyun's HUSBAND has me squealing and kicking my feet!!! He's so in love with Euihyun and Euihyun doesn't admit it but being around Taeju relaxes him so much. Taeju tapping him to sleep and the hug??? Man, they're so in love and it's so adorable oh my hearttt
Also he might be pregnant??
THE LORD KNEW I NEEDED SOMETHING TO CHEER ME UP THIS FINALS SEASON!!!!! CAIN ENDGAME!!!!!!! CAIN!!!!!! I CAN'T WAIT!!!!!!!
WAIT FR??????????? CAIN ENDGAME??FJIRGNRE