Mass Effect 2: Grunt Loyalty mission Thresher Maw
I'm not sure if this is a bug, but I feel like the boss fight with the Thresher Maw is incredibly difficult even on Normal and Casual difficulty. Its spit attacks do damage to Shepard even if it misses Shepard completely and if Shepard is in cover. Those hitboxes in my opinion are super huge with no real reason. I can't beat it. Even when I get close to killing it, most of the cover is gone and attacks kill Shepard in 3 hits because there is no cover.
I feel like I can't beat it at all. The lack of cover is one thing but the fact that the spit attacks hit Shepard even if Shepard either avoids it or is in cover is ridiculous. The spit attacks need to be turned down on lower difficulties so they don't count as direct hits if Shepard avoids it or is in cover.