Solo Leveling is the prime example of 'So bad, it's good'. You can quite literally predict what is going to happen right after the first chapter, main character with super strong plot armor, character mannerisms that can be made up by a ten year old and by manhwas standard it follows its steps with the whole 'koreans are the strongest race'.
It's lame, predictable, cringey at times and pretentious and that's why it's good, takes me back to when I was a 13yo and gives me a good laugh. I would say it's worth the read at least.