In my opinion the game is too "slow" when it comes to using functions , for example entering vehicles , climbing ladders and opening doors. I would suggest either binding a hot key to these functions like in most games or make it simpler. You shouldn't have to walk right up to a door , stop scroll, find the open door bit , and hit enter. It takes far too long and isn't realistic if we are going on how soldiers would be able to function . Similarly for ladders.
Can there not be just a button like in most games "use" This button could access doors, ladders, vehicles maybe be able to look in dead bodies gear or crates etc ?