Elchango I don't think you relies some players have played dedicated vehicles for years on end on BF4. So don't be surprised that they get good at it. You find the same in the pro tanks, warthogs and jet players, lav tow pros etc. Some of which are near impossible to counter.
If you wanna know all the tricks and tips and habits u need to get into to play attack heli better just ask or play attack heli with me and I will tell you how I do it, but don't just default auto accuse of hacks. I see you say the same of many other players which I also have a very hard time to fight against (along with everyone else) but I appreciate its skill and not hacks. For example put Riker or Hydro Smoka on enemy team with lav and they kill me a lot even with my evasive flying. It can get very annoying and make u wanna give up but it's not hacks.
Bigger picture here is just that many games are very one sided, if your team has a lot of ground then way easier for attack heli (and everyone on your team), if not little attack heli can do. I've seen even average skill players do a lot of damage in attack heli when enemy team is weak.
I would suggest a different auto-balance plug-in and see if people like more or less. But many here know you are either on the wrecking team or getting wrecked a lot of the time. Maybe 3/10 u get somewhat of a balanced match-up.