This is battlefield, not fortnite. Most of the things you are complaining about are what battlefield players want.
We want rich battlefields that look realistic.
We don't want superfast sprinting, and many old timer BF players really don't like the unrealistic sliding already in the game; we do want grounded movement similar to how a soldier wearing 80 lbs of gear would move.
Helicopters and jets are fine for many, I personally don't fly, because the controls are hard and I don't feel like mastering them, but there are many who fly well with them. This seems like a skill issue to me. I'd say helicopters could use a mobility buff though, they are not agile enough, which makes them easy pickings for good rocket launcher users.
I hear footsteps fine, as long as there is not a loud din of battle going on; why do you think footsteps should override the sound of explosions and loud gunfire?
I agree tank/ground vehicle audio could probably use a tweak in some cases; there are times it is fairly quiet around me and a tank somehow quietly sneaks onto the point. Other times, I can hear tanks perfectly fine, even when battle is loud. So this may be more of an audio bug.
I agree headshot multiplier is too low for most guns...SVK doesn't need a headshot multiplier increase though; it already is a near OHK with hollow points (99 damage), this would put it into semi-auto sniper category instead of DMR if it were any stronger.
TTK is fine in the game; we don't want bullet sponges in battlefield. Matter of fact, many of us prefer hardcore mode, where it is even faster (60% health).
You already have Fortnite, other players have CoD. Stop trying to turn battlefield into a game it isn't.
You are the reason this game is where it is! Enders talking about you bots all the time
