No matter how stupid you are if you are a protagonist of a story you will get your harem. You ask "I am the protagonist of my own story then why I don't have my harem?" Maybe because you are not stupid enough, try to be more stupid and annoying.
Jokes aside,
Everything about this show felt generic, especially in the first few episodes. Watching Asta, Yuno was like watching Naruto, Sasuke all over again. Asta being, more Annoying version of Naruto, and Yuno being, a rip-off version of Sasuke. Overall, it lacked originality!
Right from the start, this show is extremely unappealing, Reason being It's filled with cringe, Predictable dialogues. The most annoying thing was the Crappy voice-over of the MC. Literally, He was screaming every time he opened his mouth. Can't remember the last time I found an MC who was this much annoying to watch. I think this is the only anime where Eng dub is way better than the original dub Lol...(Haters will say it's a Shounen anime!)
However, as you progress through the story, You will find the MC more tolerable and also likable, At some point, you will get used to his annoying voice-over and start liking Asta as the Main Protagonist. Most of the Antagonist character development was good and well-written. Some of my favorite arcs from the show are "The witch's Forest Arc, Eye of the Midnight Sun Arc, and Elf reincarnation Arc".
We can all agree on one thing, This show ain't for everyone. It had the potential to be the best modern-day Shounen but It isn't. At least, for me.