My problem with OPM

I just started watching the series and I’m at the end of S1. Maybe it changes in the future episodes but I have a problem with this show. It’s not terrible, the idea behind it and all the fights and animation are really good. But it’s just so fast paced to where I’m finding it hard to enjoy. So many of these supposed incredibly strong monsters just show up out of nowhere one after the other with no story or timeline to it. Other animes build up their big bads but this show is just one monster after the other each claiming to be the strongest and it’s just getting kind of old now. Maybe someone can change my mind but the super fast pacing of this show is just kinda ruining it for me.