Dungeons after suicide

A young man commits suicide by jumping into a frozen Lake, only to be washed away into another world as a dungeon.

Even though he died in such a depressing way he decides to make his next life as enjoyable as possible while tormenting spellcasters and people who are assholes cos why not

Meanwhile the author tries their best to stay motivated and continue this amazing (not really) piece of literature and not cry cos there bad at grammar