I feel your pain, I used to be primarily a medic, though my gripe came from the change/nerf to the revive system where a lot more instakills happened.   You'll find there are a lot of people who don't know they even can be rievived and automatically hit respawn. Others see no medic is close by and respawn, some will see a medic 300m away and then see that distance meter not move at all, or start counting upwards and realise they are not getting revived, which can make them jaded.