I wasn't aware there was hate of that character? I guess he kind of looks like yet another version of Goku? Most people don't make fun of characters because they're not good fighters on their own, like people didn't make fun of Eren from AOT during season 1 because he was weaker than Levi or Mikasa, they made fun of him because he was whiny and kind of annoying at the start, being so pig-headed it put other characters in danger. And even then there were people who liked Eren, he was some people's favorite character. Other people just couldn't stand his English dub. There were a bunch of reasons.
I don't think you should generalise "how all people feel about a character" based on your small online group, and even more so don't hypothesise "why all people feel this way".