Bahahaha you need to read this then.
http://www.mangago.me/read-manga/my_lover_my_teacher/?bTSA
ok, you had me reading it and I finished it! Lol. It was def wtf, esp that ending??? But I stand by being most frustrated with (and invested in) Love or Hate since it's a long story, I can somehow sympathize with all the characters, and the "right" choice wasn't as clear--LoH has the fandom divided, whereas in MLMT, I think most if not all of us can agree that the MC sucked and they were all bad for each other.

AFTER I FINISH READING LOVE OR HATE I'M NEVER READING ANOTHER LOVE TRIANGLE AGAIN. THIS FUCKED MY SYSTEM