Sniping is hard in general.
It's not though is it?
I'm average at best with a 1.2 TDM KD, so if something is hard to use then I will not do very well with it at all, Riot Shield, Crossbow, etcetera are hard to use and do well with.
Snipers on the other hand because I actually use them properly I have 3 out of 4 of them in my top 5 kd guns with the XPR 1st and DSR 3rd.
1 hit kill Snipers are NOT hard to use at all if you use them correctly, I'm living proof of that.