How do I deal with Wrecking Ball in 6v6?

I was playing 6v6 last night, I went against sigma, ball, bastion genji, lifeweaver & ana on attack. Circuit Royal was the map.

Ball having 775 by using adaptive shields on me alone is intense especially in 6v6 when other tanks have lower HP pools. I tried staying far away & using high ground when possible, discord & marking/ping him when i saw him coming which worked on attack but halfway the through attack my team wouldnt look out for him so i would die to him. Then genji started diving me too. I thought perhaps i should stick closer to the team, which didnt work either as my tanks was dealing with the enemy sigma, my cas was in their backline with mercy & lifeweaver stayed with me.

On defence we got steamrolled hard, i picked brig & prevented ball diving, but genji would dive as well. Then mercy said "Fuck you" in team chat at the end, even though she stayed on mercy when we had a lifeweaver & 1 damage that she could amp.

Is zen with 2 tank, 1 damage & 2 other supports bad? Would someone be able to tell me how to deal with ball on zen, or supports that work great with zen in 6v6. I really want to get better at zen, go onto main him & not end up fueled by rage when they pull out ball & genji, only to win.

I would appreciate any tips a lot.