Yes, plenty of complaints about this overpowered weapon was filed during both world war 1 and world war 2, but unfortunately the high commands of either side refused to listen to reason and continued using this obviously overpowered weapon despite the protests.
Also, both the russians and brittish (and later americans) complained about the MG42 being overpowered and needing a nerf, but the germans just cited the fact that the russians had the PPSh 41, the yanks had the tommygun and the brittish had the piat... so they never nerfed it...