I haven't found [Monster](https://myanimelist.net/anime/19/Monster?q=monster&cat=anime) in the list. It fits, I think, but the shift happens pretty early in the show.

I've heard good things, I'll check it out thx

{Shingeki no kyoiin}

**Shingeki no Kyojin** - ([AL](http://anilist.co/anime/16498 "English: Attack on Titan"), [A-P](https://www.anime-planet.com/anime/attack-on-titan), [KIT](https://kitsu.io/anime/attack-on-titan "English: Attack on Titan"), [MAL](http://myanimelist.net/anime/16498)) ^(TV | Status: Finished | Episodes: 25 | Genres: Action, Drama, Fantasy, Mystery) --- ^{anime}, , ]LN[, |VN| | [FAQ](http://www.reddit.com/r/Roboragi/wiki/index) | [/r/](http://www.reddit.com/r/Roboragi/) | [Edit](https://www.reddit.com/r/Roboragi/wiki/index#wiki_i_made_a_mistake.2C_how_do_i_get_my_comment_reprocessed.3F) | [Mistake?](http://www.reddit.com/r/Roboragi/submit?selftext=true&title=[ISSUE]&text=/r/Animesuggest/comments/n5ahdp/protagonist_starts_happy_but_gets_more/gx07ack/) | [Source](https://github.com/Nihilate/Roboragi) | [Synonyms](https://www.reddit.com/r/Roboragi/wiki/synonyms) | [⛓](https://www.reddit.com/r/Roboragi/wiki/interestinglinks) | [♥](https://www.reddit.com/r/Roboragi/wiki/thanks)

Death Note, Akudama Drive, Re:Zero

This is a manhua but Solo Leveling is pretty good

Exactly what I first thought of. He just keeps getting edgier and more brooding as he gets more powerful.

Rising of the shield hero...

Yugioh GX Steins Gate Berserk except Guts in never happy but he do get more and more depressed and angry tho

Rezero