- Edited
You know what's the worst thing about systems? They just conveniently drop into a protagonist's lap and make him overpowered. It's lazy writing, and the protagonist is pretty much lazy too. All he needs to do is listen to the system, and voila! He gets gifts, rewards and skills that make him overpowered. Without having to work for it.
It's usually the same pattern. Loser complaining about how life is unfair, how he's weak and unpopular, and have no talent, isn't smart, is poor as f (either has no job or works several part time jobs and gets abused by his boss, or his family is falling apart and he is being deprived of resources because he's "trash"), also gets bullied by his classmates/colleagues/sect mates/family, etc. but he doesn't do a single bloody thing to improve himself or his circumstances. Then a system will magically drop into his lap, and suddenly he turns into a rich, overpowered stud with a harem of women without actually having to work hard. It doesn't feel earned. It's as if all you have to do is bitch and moan about how unfair life is and how hard you have it, and then the heavens will decide to take pity on you and give you a bunch of stuff to turn you into a god. Why should you put in any effort when the gods (or system) will give you everything on a silver platter? That never happens in real life.
At least have the characters work hard and earn their achievements, not give them a bunch of stupid system rewards. What beginner gift, or sign-in rewards, lottery or other BS. It just feels totally unearned and unsatisfying. I prefer to see the characters level up or become stronger through their own efforts, not rely on some magical system or author-given gifts. It's lazy as hell.