The guy seemed roughly on par with TV Hulk, which would be quite a bit stronger than Matt. I think he's got this even without the hammer.
Honestly the way Hulk stopped him and the look of basically "mind blown" on his face makes me think Hulk's a bit stronger.
Factor in that their big feat of the movie was the two of them combined briefly managing to hold down a helicopter but failing, presumably Thor contributed but going by how their fight went, Hulk being 2x him seems somewhat accurate as a concept.
Which is basically where I got the 30% as strong as MCU-Cap for.
The two of them combined, using both of their arms managed to do about the same feat as Cap using one arm to hold on to something and another to hold onto the helicopter.
Considering that's basically four of their arms versus Cap's one; I maybe being generous here but still; 30% Cap seemed reasonable.
Admitably that could still be quite a bit stronger than Matt.
Yeah; even getting rid of his weapons that still leaves the guy with his armor and strength advantage.