This achievement must be glitched as i scored 3 goals in my 1st match and all three were different scorers and it unlocked.
So just score 3 goals in a quick match against the CP and this will unlock.
If it doesn't glitch for you, just simply score 3 goals with the same player against a lower league team in a quick match.
i have got several hat tricks in my Manchester Reds career mode with Anthony Martial in a ST position, he's super fast and a goal machine. :D
if youre struggling to get 3 in one match, just up the game time to 10 mins
PS. Apparently this wont work against a 2nd controller.
This was my team set up, if that helps...