Don't feel too bad, 75% of that was lousy tire with no traction.

25% was lack of finesse and momentum though, which is something I see a lot of with newer drivers.

Watch the video, and notice how often you just about got over something, and backed out of the throttle. The key is feeling exactly where each tire is in relation to obstacles, and just having enough power to get over them, then let out of the throttle slightly to avoid carrying too much speed to the next obstacle.

You should never have to rev the engine that high to start moving. If you have to, you're too far onto the obstacle, and you'll just spin. Back up a bit, let the clutch out at a low rpm, then use that bit of momentum to clear it.

You should be able to drive that whole section without ever touching the clutch. Get some new shoes for the X before you try that section again, and visualize how momentum can help carry the vehicle over each bump. Look at the trail on foot, and visualize the wheelbase of the Xterra, and you'll see where you will need to apply throttle, and where not to.