So getting back into the game I realised I still only have the first DMR unlocked: RFB. Trying it out, after fucking hating it in the beta, I still fucking hate it. Easily the worst gun in my roster.
Is it at all worth grinding DICE's putrid unlock system to see what the other DMRs are like?
Yes, the ACE 53 SV is fucking amazing, and if you take the time to learn it, it is god tier. I know I'm saying that because I main it, but I use it for a reason. It is easily one of the best guns in the game.
But honestly, they're not for people who need a brush up on the basics or are just returning to the game. You need some smarts to use them appropriately. Give yourself some time to do well with ARs. Try playing Locker and get used to fighting on the outside of the map so that your reflexes and ability to aim at various mid-range distances are honed.
Also, get the M16A4 and learn to rhythmically burst it as you're doing that. It's one of the best things you can do for yourself right now after the current patch, and it's a much simpler task.
They're still outclassed by Assault Rifles and Carbines but they're useful in certain situations. The SKS, ACE-53 SV, and SCAR-H SV are the best out of the bunch; ACE-53 SV and SCAR-H SV are the last unlocks for them though so use the SKS until you get them.
I'm sorry, but this is bad advice. The SKS is trash. Its bullet velocity and bullet drop make it shit at distance fighting, and it also has a lot of weird quirks like a long reload time and slightly lower damage per bullet. It's mainly a bad mid range rifle, which the also-bad QBU is much better at. SVD-12 is much better overall and it's also one of the best 3 DMRs (the other 2 were properly stated). I suggest that in its place.