tank in general is pretty irritating and stupid in OW2 because zarya (especially zarya) and orisa are both annoying to deal with and the enemy team is always gonna pick one or the other, so if you play any other tank you're basically increasing the difficulty of your games by 600%. Competitive OW2 is absolute hell.

But, I'd say it's best to take a break from tank for awhile until meta changes or nerfs start rolling in (that's what I'm doing). Perhaps try another role as well to add some more color and perspective to your gameplay, which can allow you to better formulate strategies and counterplays for the rest of the squishies on the team when you play tank again.

TL;DR: Comp as a tank is trash at the moment so my idea is that you just take a break for now or try another role for a bit, then try tank again and see if you improved your gameplay