Don't know why it got such a low rating. It's exactly what the title implies: MC is living the slow and easy life leaving the adventuring and heroics to other people and his magic surpasses the native isekai worlders and even other reincarnates! Because he does things slowly, we got a slice of life tag (which, in case people forgot, is meant to imply story takes a backseat over intercharacter relationship building). It's a good read to pass the time and it's nice to read about someone taking it easy instead of being the next hero.
I will admit that there's the occasional mistranslation but it's like one sentence per chapter on average. Latest chapters have been pretty good about it. Honestly, though, I find it both amusing and easily ignorable (yes, that's a word now. LOL). I love a good isekai manga but having the role of hero (in one form or another) forced on the MC gets old after a while. This is a nice change of pace, but I get why some people don't like slow reading.
I give it a 7.5/10