She isnt tho? Have you tried to play her for more than 1 match? Doesnt matter what the enemy comp is cause after 1 fight they will all go beam heroes
Stop trying to gaslight people into believing this bs, pressing H in spawn room isnt skill and a monke could do it
So just stand on spawn just waiting to see what the enemy goes, got it 
Adjust her DM to 15m back again, better mircomissiles, reduced critbox, more armour, more dmg on boosters, better spread for more consistent damage without having to hug the enemy, i mean there are many buffs that wouldnt make her OP
Refer to this thread for more info: D.va current status in ow2