Review Detail of Reevoo in The Novel's Extra's Extra

Author seems to understand Novel's Extra quite well, so I was excited for this even though the grammar was nothing to praise. However... it went downhill fast. (FULL OF SPOILERS BELOW) Some things that really bother me are, - The MC curses all the time. Like... In almost every conversation he has, he's going to curse. It just honestly results in an off-putting MC that has a small vocabulary who can't speak without feeling like he's superior to everyone else. - Out of nowhere, we get some real chunni shit dumped into the back story of the MC that becomes his extra powers in this world. Some weird, cringe dragon stuff. He also has other power systems other than mana... that add nothing special to the story. Just another way of making the MC OP. Any enjoyment we could have gotten out of someone using their meta-knowledge to get stronger is instantly taken away as the MC is already one of the strongest in the world... while also at school and doing nothing other than cursing other people out. - Progress is slow. Now, that usually means we see character development with other characters and with the MC, but like I said before, he spends most of his time cursing out other characters and saying the same shit 10 chapters in a row to this OC archer girl. ... However, the banter between the MC and Kim Hajin is actually really good. Even though he starts pushing for character growth from Hajin even though its only been like 3 days... C'mon. Anyway, it's not horrible, but I feel this should be used as a draft for the author to rewrite it without the shitty out of nowhere power up, tone down the cursing and increase the pace of the story.