Indeed, PAs especially efficient, are perhaps the most difficult to use weapon in game. It took me over a year to get better at them ( I am a 55 year old bat). And I still need improvement. Please don't be too hard on yourself!!PAs do fantastic damage - when they hit. For anything less than a skilled pilot (so - me), gimballed multis will stay on target more than enough to do more damage. I use a triple PA setup for fun on my Chieftain, but for killing quickly, it's beams/multis every day of the week.
Just in case, below is what I did to get better with PAs:
I used a FDL with four medium gimballed multicannons and one huge PA to learn. If you don't have a FDL or don't like them, a Viper mk3 would be fine, too as well as any other agile medium ship. I have a Chieftain with PAs rails and a turreted MC. The multicannon reticle is key because it is on the same vector as the PA reticle but is closer to the ship. I used the MC reticle to train my eye to track the PA reticle. The further you are from the target, the more spread out the MC and PA reticles are from the ship. You want to fly in such a way as to get the reticles to bunch together. The closer you are to the target, the closer the PA reticle is to the ship, and the more likely it is for the PA to connect. The PA reticle is very deceiving and a feel for the target vector is at all times is necessary. You could aim precisely but not hit the target because your PA shot was not on an intercept course with the target ship vector.
I farmed czs and massacre missions with the 4mc 1 PA build until I was able to connect the PA almost Every Single Time. It is especially difficult to hit small ships with PAs, for example, Viper 3s. However, since I PvP, I needed Viper 3s to be easier because humans are even more difficult. Then I gradually substituted the rest of the MCs with PAs. One of my favorite builds is four PAs mostly thermal conduit and one target lock breaker and one turreted corrosive mc. I love having the mc reticle reference in especially asteroid belts, where the rocks often obscure reticles. In open space, I no longer need the MC reticle as a crutch.
PAs are extremely frustrating at first, however they are really one of the best weapons in game. You will gain significant skill in range control because you will realize the closer you are to the target, the likelier the shot will connect.
Also:
1. As I said earlier, the damage dropoff is 2km. That's huge. Some lasers have drop offs of 600m, which means at greater distances your damage will be diminished significantly.
2. PAs do absolute damage which means no manipulation of resistances will help your targets.
3. After you become more competent with PAs, you will have to rearm far less often and target destruction will be much faster. I usually solo and win two low intensity conflict zones back to back without having to get more ammo.
4. The most damage a single player in a medium ship can do is a plasma ram with corrosive.
5. You will be a master at range control.
Anyway, best wishes!
o7