I think most games have this aspect but since so many of us have been playing the same old genres that we forget they have some technical skill to them.
Someone mentioned touhou so I'l delve alittle deeper
Shmups although it's a hard genre and there are many examples made for highly skilled players there are many rewarding and easier examples, from Gradius NES, Jamestown, Deathsmiles & Mushihimisama Futari Original mode, to the easy to intermediate level doujins like Exceed 3rd appearing on steam.
I can understand why so many ppl can't play them as especially the modern bullet hell kind are about overwhelming and crippling the player with mental pressure that it seems only ninjas can play them. However after just a little time spent on study and knowing fundamentals (hitboxes, bullet types, bombing, safespots and the differences between survival and scoreplay and how to tap dodge and herd bullets) anyone can play them, the only big difference between easy and hard is the speed and density of the bullets.