In a Corvette you really shouldn't be worrying about anything the game can throw at you or you have some build issues going on. I don't take large ships to RESs or comp navs for that reason. Even 6-9 NPCs should go down pretty quick since it's not going to take much to knock down a small ship, especially since you have 5 other hardpoints available. With the big money and best materials drops in those scenarios coming from the big ships you can easily hit though, I know what I'd be prioritising.Any gimballed can become a fixed weapon in an instant, but no fixed can become gimballed. The only inconvenient is a lower damage, but you can compensate a bit to that with overcharged. The argument I made is not about hitting small ships with the slow firing PA - but again, hitting them CONSTANTLY - something very hard to do, especially fighting 3-6 or even 9 of them at once; CZ are "soft" compared with some ResH where you may get swarmed by 2-3 wings AT ONCE and you need to kill them fast and efficient ;
NPC.s are indeed bullets sponge when you fight them 1 vs 1 or 1 vs 2 - but why you do not load 10-20 tones of gold and jump in a CNP and try to fight them there ?
Soon you will realize how thing change, lol.
What you need from a Vette is not "nice" kills but yes a flexible, but - most important - an efficient killing machine, something she can excel at.
But as I said, YMMV. Don't assume that the OP wouldn't be able to do that with practice. As you said, it's hard, but it's not impossible.
Again, I'm suggesting an alternative to what has already posted above and I've certainly not suggested that anything above should be ignored. As was mentioned above though, with the OP not explicitly saying what sort of combat they were wanting to do (CZs, assassination missions, Haz RES/comp nav beacons) different builds might apply. Could be that this is for an armed trader build and they primarily want to take down pirate Anacondas and T-10s. If your primary targets are those things, it's not going to take long before you're able to do consistent hits on ships that size.