I'm stuck on an MTB boulder plateau

I can ride over sizeable boulders and logs, but I do it incorrectly. This means I can't do big or tricky ones

See the problem?

I learned to ride over boulders like this one back in my mototrials days. I adjusted relatively quickly when I switched to mountain biking, but now I can’t clean anything larger, including big logs or high ledges like picnic tables. I’d like to improve because one of my riding buddies routinely hands me my ass when we session big obstacles. Plus, bigger=more fun.

I started working on this problem last summer and then again this spring when the snow began to melt. I call it “my upright problem.” This comparison image of screenshots shows it:

That’s my boss at RLC, MTB legend Ryan Leech, in the middle screenshot. And that’s the equally talented MTB legend Jeff Lenosky at the bottom.

You can see in the screenshots that Ryan’s and Jeff’s arms are extending while their hip hinge angle gets more acute. They’re stable and in a position to maneuver the bike in a variety of ways. I’m precariously upright. And I’ve done it this way for years. And now I’d really like to get over (hah) this boulder problem.