I hate when games make my laptop processor run at 100% for no reason. Sometimes it's justified of course, but many games don't lag at all when I switch the CPU mode to "power saving". The only difference is I don't have to insulate my leg, so they're somehow wasting tons of cycles on nonsense.
I also hate it in metroidvania games when the direction of progress is more obscure than most of the secrets. Happens every time, I always eventually have to look up a guide for like one or two parts 3/4 through the game. So frustrating.
Most recently in AM2R... Sitting here with 6 energy tanks and 175 missiles, but totally confounded by the power bomb gate puzzle. Because part of the puzzle hasn't spawned yet, because I haven't killed enough metroids, because I missed a doorway... From a room that had a metroid in it. Mainly kicking myself, but I swear the metroid symbol makes it a little tougher to notice the doorway on the map. (Also there are like three extant doorways I have to ignore because they require power bombs, but the map doesn't convey that).
Best part? Yeah it's my fault I missed *that* doorway... But there are *two* metroids in that side area. One of them in a literally secret room that *doesn't* get a doorway indicator! Yeah it's a fairly obvious tunnel when you're there, but gods help you if you left without getting both.
It's some consolation that 4 super missiles and all these energy tanks make omega metroids pushovers.
Edit: AM2R IS REALLY GOOD THOUGH
Just got power bombs (the right way, I was on the wrong track). Besides missing that one doorway to that one metroid, it's been a great experience. And it's actually getting more interesting as it goes, with unexpected new areas.