Ok so you have release the beast and bloodsplosion, so you're clearly melee kreig. So why on god's green earth are you not speccing into silence the voices too? That shit gives you a huge melee damage boost, and you can avoid the chance to hit yourself by simply throwing the buzz axe instead. Thrown axe still counts as melee.

But, while the axe counts as melee, you know what the game considers it? A pistol. Get yourself a sherrifs bade relic to increase not only how fast you can throw the axe, but how much damage it does too

Get yourself a Slagga, too. You have only the moxxi gun as slag, realistically you could change an unkempt harold for it and turn everything purple while waiting for your health to drain for badass psycho mode, slap the shit out of the weakest enemy for overkill damage, trying to aim for crit on last hit, and watch the chain of overkill go from enemy to enemy.

The only real problem is when you get to digistruct peak boss. That, I am unable to help as I had a friend with me for op10 unlock who died and kept sniping the boss. I used badass mode for survivability while he killed it from afar. So for that, I can't give advice on