inconsistent gun play and damage.

Had high hopes for battlefield 6. I'm not sure if am the only one who feels this way. Getting really sick of games makeing SMG melt people from half map and do more damage then LMG. This is getting super old in the shooters. LMGS are meant for sustained fire and large damage so plz would like to know how from mid to long range we keep losing gun fights to SMG VS. LMG this need to be addressed before the launch of full game. Also why is it opposing players can land 1 or 2 shots and kill you but u can mag dump a guy and get 0 damage an this seem so be consistent in almost every match we play. Thats my rant just want to know if anyone else is in same boat.