
I think your opinion is quite true but there is a reason why the MC in solo leveling is so powerful, you will know later and he will also make some sacrifices and allies in the coming events. As the title indicates “solo” leveling is mainly about the MC because that is how is suppose to be. In my opinion both of them are amazing and different.

I'm not saying this about only Solo Leveling. In fairness, I think it's pretty good even with it's fair shair of flaws. I've seen way more blatant instances of terribly over powered character progression... but it's usually from chinese manwhas. Mostly cultivation stories with lots of random pill boosts and random explanations that mean nothing to a westerner.

(Warning!! spoiler)
I just read this sentence and turn out laughing
"lets not forget all those cannon fodder characters that we'll see for like 10 chapters only to die off and we'll NEVER SEE THEM AGAIN"
You should start to read the novel, why they're dead? Cuz 'someone' search on something. I really don't wanna spoiler but at the end of season 1 in manhwa, you should "think" the unknown person. Who they are? What are they doing in jeju island?
Like i said, its funny if jinwoo isn't an op character. Well this story and SL have same problem, the end of the world.

im not saying Solo leveling is the worst offender. I've just read alot of cultivation/leveling etc stories and the progression can be steep or have little... um... balance. Alot of them tend to just make the character be an all over the place unit with no balance. we all know mmos have different characteristics to balance... tank dps support healer mage etc and im sure there's correlating terms for chinese cultivation but most stories just forego the balance, ignore support abilities and make then physically strong, strong magic and almost close to perfect defensive capabilites.
Like... he LITERALLY almost had a healer/way to heal himself and his army... but the author probably realized he was getting too op... so he wrote in that "oh please dont take his soul" scene. (and honestly i was confused cus earlier his power mentioned that souls would lose the ability to go reincarnate or whatever after the soul is transformed)
honestly I think this story is better than Solo Leveling in the long run. The main character is powerful but limited in his power and even receives a setback with him losing his eye. (i dunno if he will get powercreeped later but its fine for now). His allies are also suitably powerful and the main character while unique doesn't outright overpower the other characters in his team.
It's pretty lame how often i see a solo character that just gets stronger n stronger that i kinda lose faith in other character to do anything meaningful. and it becomes obvious that all meaningful items will just go to the main character like the hog they are... and if there's a good item but someone else gets it... nvmd there's something IMMENSLY BETTER AROUND THE CORNER!!... >.> .. oh and im strong enough lets finally start to give something to my love interest and allies... not that it'll matter cus you're still pitifully weak. lets not forget all those cannon fodder characters that we'll see for like 10 chapters only to die off and we'll NEVER SEE THEM AGAIN... *rinse repeat*