it is hahaha but personally i think its ok that its anticlimatic because him as dr trigger isnt that important to the plot. i think it wouldve been too forced/cliche and unnecessary if he had a special reason for it
president koo is the other dr trigger. the adulterer is the guy who left the team in ep1. so it was actually him. the reason why han do did what he did is explained in the last scene when she asks him. the reason isnt a big deal, he just did what he thought is the right thing to do. because apparently before he became a part of trigger, he looked up to them. more like respected them. after finding out someone from the team was having an affair, he was disappointed. he couldnt accept the fact that someone from trigger, out of everyone would let him down. these are his words when she asks him why he posted it. tbh i dont think it rlly answers the question hahahah
its all explained in the last ep, are you sure you dont want to watch it? the last 2 eps were the best in my opinion. im gonna post the answer below if you still want to know
han do is the original dr trigger who posted the first post about someone having an affair. but someone else used his id to post the picture of oh so ryong
also y'all koo hyung tae's manipulation game is so strong he even got me fooled, i started feeling bad for him. Han Do had to knock some sense into me too
When she was like what are you doing i reacted the same way, obviously not as cool as kim hye soo was lol i was like *giggles uncontrollably and very not lady-like* omggg what are you dOinG!!