You’re playing bads, lol.
Everyone takes Toby stun who isn’t clueless, but it does nothing to change the core flaws with the character (over-reliance on a weak shield for any DPS at range, huge hitbox, crit spot at center of mass, terrible ultimate).
If you’re playing up front and aggressively against competent enemies, you’ll feed like no one else can feed. Hitbox the size of Montana without the sturdiness to match. Mobility in bursts but not enough sustained mobility to really float around the front lines and escape. A slow-firing primary weapon that does beastly DPS under the right circumstances, but less reliable when you’re jumping, strafing, and generally playing like a front-liner.
No, the arc mine stun is great, and is good for both pressuring and defending, but Toby is one of the few characters with no damage drop-off or ballistics attached to their ranged attacks, and has nearly-hitscan projectiles from behind his shield.
You do far more work for your team keeping range, using the shield as much as feasible, clearing waves with arc mines, and using the mine stun for clutch attacks on over-extended enemy Battleborn.
There are far better brawlers and skirmishers than Toby, and just because you have a stun doesn’t mean you should be dragging your house-sized butt into the fray.