ai glitches

suede

I have been playing this game for some time now have been running into one continuous problem. In PVP/PVE the enemy team continues to use abilities using either 2-3 or less ap required to cast it or only having 1 or 2 colors required for it. There are also numerous times when the enemy team has used the ability and it utilized less ap than what was stocked. This has caused this game to become unenjoyable plus a pain to play. I do not bring this up to D3 as they always claim there is nothing wrong or would like screen shots. Can someone or others please try and let me know why these things are happening? This experience has made me very regretful that I've contributed time and money to this game. Looking for positive answers hopefully.