[Senip]

Slide your hands out further, the further you go the more stable it'll be (although I tend to do only a little bit further than shoulder).

And I would argue that you should squeeze the shit out of the bar with any exercise. The harder you squeeze, the more power you'll be able to pull out, regardless of it being squats, or bench, or deads. Squeezing is a signal to the brain that it's time to get dangerous!

I'll do a video of my squats on Friday or whenever I decide to do legs, maybe that could help.