I don't see that happening until I get better.
In order for a person to win, they need to get enough details done at a sufficient level, for their techniques to work on the other guy. If a person is bigger and stronger, they need fewer details to be right and those details can be less correct. When two people are of similar size and strength, then each needs some details, done at a reasonable level... in order to make their techniques work. As the other guy gets bigger and stronger, the little guy needs more details and he needs those details to be more correct.
With two guys of similar size and strength, maybe each one only needs to get 3-4 details, with each of those details being about 25-30% correct. That may be enough for one to apply his techniques on the other. When one of the guys gets way bigger and way stronger... the little guy will not be able to use the same 3-4 details at 30% to win.... he will need 20-25 details, and all of them will need to be at 80% or higher, to make the techniques work on the bigger guy.
When people work with others, where they are able to have a bit of success in their techniques.... they tend to use the same 3-4 details, done in the 25-30% range. Sure, maybe they get one detail to 32% or occasionally get a 5th detail in there... but they are experiencing "success" and "winning" with just those 3-4 details. They may not even know about the 100s of details, that they do not need, when working with people that they can have some success with.
When the little guy works with the very much bigger and stronger guy.... it forces him to look for more details to add, and to look at how to do each of the details better. Lets say that over a period of time, the little guy adds 5 more details, and gets all of his details up into the 40% range.... He still loses and gets manhandled by the big guy. But, when the little guy goes back to the guys he normally works with, he has 8-9 details, each at 40% where the other guys still have 3-4 details at 25-30%. The little guy now has an advantage in the number of details and the correctness of those details. If he continues to work with the big guy.... he will keep adding details and making all his details more correct.
When he gets in the 15-20 details range, each at 60%... while he still does not move the big guy, he does mop the floor with most more evenly matched guys.
What can be super frustrating is that in this range, the little guy starts getting close enough for one of his techniques to work on the big guy... and the big guy makes a small adjustment, completely shutting down the little guy. The little guy needs to understand, that he has now made enough progress that the big guy needs to make an adjustment. ( There have been times when I have been in these situations.... I needed "wins," not "successes" in order to keep from getting too discouraged. Those adjustments the big guy made to shut me down, were the "wins" that kept me training... and not throwing in the towel.)
Which I don't see happening if I spend a round unable to work.
I am not going to promise that you will make much progress against this particular guy. But, by continuing to work with him and applying any of the advice given here in this thread, by pretty much any of the participants.... I can promise that you will get better at dealing with the other folks that you roll with. I can also promise you that your will learn and perfect more details.... these details will show up and give you advantages against other folks later.
You can duck him. You can pick up those details elsewhere, and improve them elsewhere. But, it will not be as fast. And you will still have to tackle the mental part of having someone much bigger and much stronger manhandling you. (that part you only get one way)