Most of that sheet is great, but there are a couple points I'd like to bring up. Strengths are a character's talents rather rather than powers. What you have right now are several powerups, ones that are too strong at that, available in one with no perceptible limits. A powerup is something external to the Slayer that he encounters periodically in his game, so while it's possible that they could be adapted, it would have to be in a far more controlled fashion.

You pretty much describe his Strengths in the Specialty, which could easily be replaced with 'Offensive Powerhouse' or 'Point Man'. For Strengths, you could reroute what you have in Specialty to something like:

1. Physical power - the Doom Slayer boasts superhuman physical strength
2. Weapons expertise - possessing an instinctive understanding of and affinity for firearms, the Doom Slayer is skilled with a variety of new firearms and can learn to use new ones very quickly
3. Unrelenting - an incredible degree of stamina allows the Slayer to keep on exerting and fighting far beyond most combatants

You also get access to one Power. A good place to start might be Glory Kill, which could allow him to replenish health or armor depending on how he kills his enemies.

By the way, just out of curiosity: why does he have the Infinity Gauntlet in his picture?