You have dark features (Hair) but you need to work on the voice. Don't know how old you are but a darker character should have a deep voice and be imposing and intimidating. Your facial features should show more than your words do.
I play a lot of dark characters in film (I have dark facial features, dark hair, etc) and honestly my best advice to you would be speak in a very soft but intimidating tone (Think Jake The Snake, Raven etc) and let your look do the rest. If you're actually in the business and performing consider black hair dye and let your eyes and face do the talking. If you can project that you're a villain with your face and your eyes it doesn't even matter what you say really except for key parts which in wrestling would be time, place etc
When you started shouting I (And others probably) could tell it's clearly put on and quite frankly it was a bad acting job. You came across as you were acting not legitimately pissed and that's the worst kind of performing. When people know you're acting they're not going to become invested in what you're doing or saying.
Shark gave some good advice also. You have a look that could be used to portray a dark character but you didn't put anyone over (You buried Punk), The match wasn't sold and we know nothing about why Darren Dangerous is a force to be reckoned with so why am I going to pay to see him? I'm not.
A good heel will always put over a baby face. Lines such as "Punk you're good, But I'm better" go a long long way with an audience. If you're legitimately looking at a wrestling career maybe acting lessons would be good for you. I was listening to a Matt Striker shoot just yesterday and he says "There's always room for people that can talk in WWE"
