They should start by making the vertical indicators for damage more apparent. I don't feel like I should die 20 feet in the air to D.Va ulti :/
Are you on console? this isn't salt. salt is if i was getting outplayed and getting mad about it... this is just a hassle and not fun. When i see games turn because a Torbjorn turret is in a corner in front of their spawn point when we're trying to capture i just sigh because i know the entire match will now revolve around taking out the stupid turret.
It's the same stuff as 8 years of TF2 and people having trouble with level 3 sentries, except this time they deal 3x as less damage and there are twice as many ways to deal with them.
Because they deal shit damage ANYONE behind Rein will kill one, 3 direct rockets kill (blast Torb away from repairing if he is with knockback ability), Hanzo Shot and scatter shot, or mark it so your allies aren't stupid about it, Junkrat free all day, like it's not walking 5 feet from a corner an dying to a 300DPS bastion, you have so much time not to die.
If you have trouble peeking corners then just get good angles on Junkrat, the bombs don't explode till they touch the ground so you can always get an angle on almost every map. If it's bothering you that something that takes 6s to get rid of is a 'focus'... it's really not.