The Reset Problem: A Case for Single-player Matchmaking

https://www.gamedeveloper.com/design/the-reset-problem-a-case-for-single-player-matchmaking

single-player dynamic difficulty balance matchmaking roguelike

In single-player games, players die, restart, and often have to grind through boring/easy content. Players don't get to practice long at their highest skill level. There are some game-design solutions to that: dynamic difficulty, and single-player matchmaking. Specific advice about roguelikes here and here.