Honestly,I feel like theres too much burst of damage and healing.

[Soul]

So I got like 20h in,got lvl20,and honestly yeah,most matches boil down to snowballing who gonna burst down a dude first and then its just picking the rest.

Burst damage,you see a psylock (and I main her so I'm guilty of it) appear next to you? Crossbow > shuriken > crossbow slash = down in 1.2 second
Hawkeye or Widow? Lol
Iron fist if he get you from behind? Byebye
Spidey? If he hit you with the web,its combo time and if you have less than 275 goodnight
Panther? Drill kick,spear explosion,slash,gg
Squirrel? If she hit you with the stun its almost always over
Hela (bro do we even need to say? Headshot and over,no matter the distance)
Starlord/Iron man are kinda less burst but one can headshot gallore and the other just use super armor ability to be annoying asf
Bucky grapling > shoot > punch > shoot > dead
Punisher? SHOTGUN,can melt tank in 2 Headshot +1 normal shot (and turret)
Moonknight ain't bursty but ♥♥♥♥ just ping pong between enemies making it even easier for anyone else to kill them in a sec
Wanda? Just annoying asf honestly,but I wouldn't consider it bursty tho her alt click is like,a 3rd of most dps/healers health.

Hell thats just the dps but some healers got some nasty stuff too.

Jeff AOE is just so strong,a 3rd of a lot of DPS/healers,and again,its an AOE that come out quite fast
Mantis headshots are good,and she can boost her damage,and that stun that last 3 whole sec is so easy to us.

And thus,to counter those TTK we have,the burst heal

Most healers can just,heal half your health in a press of a button,without much need for aiming in a lot of cases,Jeff is the easiest,dude don't even need to be here,he put bubbles down like free sodas,and then can heal spitting at you all the time.
And almost half the ults feel like Zenyatta's,constant heal you can't outdamage unless its like Iron man or Wanda ult,and some can still act too like Mantis or Cape which damage while healing spinning around.

I feel like everything is just burst down a dude before the healer press the "no" button.

[Pie Eater]

I kinda feel the same way. I honestly treat this like CS meets overwatch in that sense. Everyone can dish out chunky damage , or make a quick escape, so it makes CC and Healing very strong.