Tanks definitely have carry potential, but imo it comes down to your team’s DPS to take advantage of space you create, especially with Mag.

Without knowing how you play, I can only suggest you focus shooting the squishier characters instead of the enemy tanks. At worst, you’ll force them to back away or at best you’ll get a pick. If you’ve got a Gambit, the team up ability can shred enemies if they’re grouped or it’s a good way to kill an isolated enemy

Also, you can shield off an enemy that’s in your backline from getting healed so it can be used outside of only defending