I don't mind author want to create underdog story. But hell, can you at least do some research 1st? Or at least make new "Class" that absolutely fit with the theme of the story.
1st, Summoner ain't worst Class on MMORPG. Summoner is actually one of the favorite class that sometimes broken or dev find hard to balance.
2nd, Author said MC choose the worst class ever. But that Class was "Hidden" Class. IDK if he's drunk, but "Hidden Class" was mean to be specials. Why the hell suddenly it became worst in the eyes of MC/people when that class are rare/hidden?
I read the novel, and honestly, this story are boring.