Aside from the obvious ones, such as footsteps, shots and reloads. Can the enemy hear when you switch from knife to gun? Can they hear when you equip an ability (ie Sage wall)?

I’ve been grinding this game since February and I started at bronze 1 and am currently gold 3. All of my Gold 2 games I frag out in and feel really good like I belong in plat but whenever I rank back up to gold 3, I seem to be absolute dogs...

Does anyone have any tips that might decrease reaction time. Noticed I had a bit of trouble with that. Cocaine and a truckload of energydrinks are not an option btw.