Climbing inside vehicles can get really frustrating when you can't find the prompt on the screen, you have to try every aiming angle before it eventually appears.
It's often when the door of the vehicle is already open that getting in is clunky. Sometimes you get the prompt for "close door" or "cancel handbrake" and when you're in a rush (enemy shooting at you), no more than once it cost my life because I was fighting with the game to try and quickly get in the driver seat.
If that system can't be improved, this is my proposition :
Add a generel keybind to automatically climb into the nearest seat located around the player, like in Grand Theft Auto for exemple.
When you are near a car door, you can press "F" no matter where you are looking at and the caracter will open the nearest door and enter the car on his own.
This could make getting inside vehicles a lot more intuitive and less clunky than it is now.
Thank you