The background is a bit too much. Rather than my eyes being drawn to Junkrat's crazy face, giant gun, or even those sweet pecs, I'm stuck staring at his crotch/leg, where his pants are closest to the background explosion's centre. The contrast there is overpowering, and takes away from the lunatic Aussie.
If the entire background was more like the top portion around Junkrat's head, I think it would be a lot better.
I'm also not a fan of the smoke coming from his head. I didn't even realize it was smoke (I thought it was just more of the textured background) until I looked closely.