Review of Death March to the Parallel World Rhapsody
This anime faces the same issue with a lot of Anime(s) that falls into this genre. I don't particularly have anything against isekai, hell I don't even mind the character being over-powered (which he was), what I do have a problem with is when a character doesn't seem to fit with who was before in the previous world. The main character starts as 30 year old, but as soon as he gets to the alternate world, within 15 minutes his voice changes and sounds like 13 year old. His actions, like all other anime in this genre, does not reflect a 30 year old. Thereis no plot, there is no clear story-line and as with the most of these type of shows the main character weak.
My recommendation: Better of watching a hentai, it is far more fulfilling than this crap.