Whats fun with pve?

I have given pve a new try every expansion during all these years but i cant even do a single raid/hc without being bored. I dont wanna sound rude or anything but could you explain to me whats so fun with raiding? I mean, its so boring to stand 25 ppl smashing at a boss with your "rotation" were the boss is just a program and not even a player that cant think for its own, its actions is only a result of a computer generated program. What can be so fun in that?

In pvp for example you cant use any specific rotation, yes you have a priority list but you cant use a rotation like in pve since every situation is unique in pvp. This is because you are against another human player that can think and act at your reactions (unlike a computer generated program that just being there looking stupid). Im not saying pvp requires more skill, im sure pve is superhard. Since i dont see the point behind pve i thought you pve heroes could enlighten me. So, what makes it so fun to gather 25 ppl and hit computer programs?