I’d either ski up a back of a bump absorbing it or slide on the back side of the bump, pivoting or full hockey stop...
Try skiing one bump at a time. The goal is to ski up to the top of a bump and be fully stopped without using the usual pivot, hockey stop or other "braking" type movement.
Think what it entails and how you would achieve that.
Speed gain ceases to be a problem when you can stop smoothly on each bump, without a hockey stop. So to fix the speed gain, learn how to stop on each bump. To avoid having to use hockey stops, go slow as you approach that bump. Cruise to a stop. Go to the next bump, cruise smoothly to a stop. Slow to next bump, stop. Next bump, next bump, next bump. Smooth out your snail's pace travel, with its stoppages on bump tops. Do this for the whole run, over and over. You will indeed be going very slow.
How to slow down on the top of a bump, coming to a stop? Point your skis all the way to the side, with the tips pointed even a little bit uphill. Or, same thing, with tails pointed a little downhill. AKA complete your turns, every turn. Since this is bumps, your feet need to stay under you as you do this, not out in front, and not downhill of you.
Look ahead one bump at a time, choose where you will stop, and do it smooooothly. Ski, cruise to a stop, ski, cruise to a stop, ski, stop. No jerky movements, smooth flow all the way. Don't allow your thrill-seeking self to speed up.
Embrace the challenge of making this downhill travel smooth and graceful, poetry in motion. It's harder than it sounds.
Once you can do an easy bump run reliably this way, you're ready to replace those stops with slows. Practice poetry as you morph stopping to slowing on each bump top. Aim for mastering this stage, slowing to a crawl on each bump, targeting one bump at a time and hitting each target consistently.
Add speed on current terrain before steepness as you progress. When moving up the hill, start sloooow again on the new terrain that has more pitch. It will be difficult to stay slow, stay smooth, stay on target.
Matering this task will be your path to balance and control. You will be infused with an attitude of serenity. Think Zen. Go slow to master speed.