Yes, it's as dumb as the title suggests. It's the same old isekai you've read a thousand times except in this one he occasionally uses his cell phone... Every single line of dialogue is predictable. Every action and event is predictable. There is an attempt at humor here but it's so generic I doubt anyone would actually find it funny. The artwork is horrific. Most of the panels don't even have backgrounds. They couldn't even be bothered to add texture or shading. It's quite literally just an outline of someones head and a text bubble. As per usual with this genre, every chapter is justthe overpowered MC showing off his amazing powers. Would never recommend this manga.