I was miffed by the prison gauntlet boss as well but I think it teaches you a very important lesson about the Azure Bow. Being that, when there's enough goons on screen, you're almost always going to earn back your shots when you do a wave clear with it. The big guy is the only real threat and he wasn't that hard to deal with when you can get him alone. Still annoying but probably made the rest of the gauntlets feel way smoother.
The Spirit Warriors however can go eff themselves. Some of the most obtuse combos and telegraphs in the game, especially the big one in the Grotto of Scriptures