Reaper is not supposed to die to Tracer's pulse bomb though. I've dodged it many times using wraith form when its stuck to me. Same like how Mei can survive it in the ice block.

D.Va's exploding mech is easy to avoid. Any skill that absorbs damage even if it is less damaging than the explosion will block it. Example Gorilla's shield can absorb 600 damage but DVa does 1k at point blank. It completely blocks it. Even if the shield has like 5hp left, it still blocks it. Reinhardt blocks it too, Mei's ice wall, a lamp post, destructible crate, flower pot etc etc. It's pretty useless for killing but good when you want people to leave the area.

YEAP...  the lamp post thing is just lol... never know anything about flower pot.. what map.?

easy to avoid if you know where it is... now people a rarely die from D.va ultimate