Arifureta Shokugyou de Sekai Saikyou, Plunderer Recommendations
Both have weak-to-OP male protagonist and girls falling for him showing off his powers.
Both have dark stuff about betrayals and deceit that the world they live in is distorted/twisted and has an ugly history that has been covered up by the real antagonists.
Only difference is that Arifureta didn't suffer an over-padding dialogue; Plunderer unfortunately did. Plunderer's hero is wishy-washy and turn on a dime which got me rating Arifureta higher for Hajime is the opposite of that hero.
Also animation quality is subpar in both shows but Arifureta seems to be tolerable given it's only one-cour.
If you're looking for either about dark stuff of deceit and