It's like it's someone took a statistical average of all isekais and combined them into a series. Honestly it's not that bad mainly because it follows the tropes so heavily nothing goes wrong. You got dark hair is bad, evil looking guy going evil things, scary trainer, heroine/waifu, love triangle for no reason, op magic, op sword, god that's a girl, Japanese worker with bad boss, adventurer card, guild, one hiting monster, bullying mc because he's "weak"... If a coloring book was readable, this would be it. I flip through quickly enough so it's basically just simulating my retinas and I am pretty sure I didn't miss anything.
This is one of those it's 6 am in the morning, I didn't sleep, and I don't know what I am doing with my life series. I predict this will be an anime series at some point. Every time an actually original series is axed, I will think of this and weep.