Much like Dark Souls, Sekiro is a tough game. Demanding players master its combat loop, its release last year sparked a whole debate about easy modes and accessibility options in gaming. To some, though, Sekiro wasn't tough enough. It clearly was missing having every enemy be the last boss of the game.
If you're one of the few that has become tired of life, let this randomization mod help you along a little. Allowing users to tweak practically every aspect of Sekiro, the main idea is that you can mix up the location of key items. Sekiro is designed in such a way that this is possible, so it would be interesting trying to work through the Gun Fort just to find the key to Hirata Estate.
You can also just spawn a bunch of boss characters as standard enemies.
If this tickles your fancy, head on over to Nexus Mods and give it a shot. Installation is simple with a step-by-step guide that will ensure you don't mess anything up. If nothing else, you can always make a back-up of your save file so that you don't ruin anything. That way even you can experience battling Isshin at literally every corner.
Source: Nexus Mods, YouTube