Well if you were all powerful, wouldn't you do the same? He basically became a God. They could have skipped the whole cup thing and ended it there but the author wanted a happy ending and as a sucker for those, I love it. As for his son, he's not actually "leveling up" he was born powerful but his power was sealed. His dad is slowly unlocking the seal. He obviously doesn't want his son to actually suffer, he just wants him to prove that he can handle the full extent of his powers. As for the romance, I completely agree but the other option was to take some of the action out and replace it with romance which a lot of action readers don't like. Not to say your opinion isn't valid, I just wanted to put in my personal view of it. I genuinely cannot think of a way to improve this manga, in my eyes it's literally perfect.
true. everyones got their own preference when it comes to these things and personally i just found the ending unsatisfactory, if anyone found it otherwise im glad you like it! and yeah honestly (for me) i wouldve been happier if there was no romance at all - since im not a big fan of romance in action mangas.
tho again personal preferance! and yeah i agree with you that its an amazing manga
still, romance is better than harem imo. i hate harem but ill kinda accept romance, and the romance here also not annoying bcs they only appear at the end of the story
i love action and this was honestly an amazing webtoon. the art (which gets better by alot) was gorgeous as well as the premise of the "game" and "leveling up" aspect was cool as hell + its completed and thats a plus
tho... i really hated the ending it felt like everything that had been built up, his progress from E rank to S+ rank was meaningless when he turned back time. and also the romance was weird for me there was no chemistry what soever that i saw between those two and the fact that his son practically instantly became level 100+ makes it seem like everything the mc did before to get stronger wasnt that hard or amazing at all.