That's probably true. Fixing your keybinds honestly makes all the difference between a job feeling awful to play and being smooth sailing but that takes a bit of time and effort because it's not something someone else can do for you all that well. I know it from myself aswell: I'm not a melee dps player so I havent put much thought into keybinds there which makes them bad which in turn makes those jobs not fun to play.
I went scorched earth and move exclusively with holding both mouse buttons. More easily accessible keyboard buttons for me.