Hello Michio!
I have played bf4 for a long time and sometimes this can be very frustrating. There are a couple of different ways to deal with this, first, it helps to have a team that is taking advantage of all available vehicles, AA, boats, tanks etc. Obviously, this can't always be achieved and server hopping might be the best option if the enemy chopper is dominating. I would recommend to keep practicing as eventually you will understand how to guide missiles without using lock-on assistance, trust me I used to think it was impossible. Also when locking on to anything never fire your missile before the enemy deploys flares, often people fire when the enemy heli has countermeasures ready and you will never get a hit off. This however is why more experienced players prefer non-locking RPGS because professional pilots will just retreat and recharge their countermeasures into an endless cycle. I hope this gives some insight, there really is not a correct answer other than to just tell you to practice more which naturally takes a very long time. I believe in you though :D
Very respectfully, Slushi.
