I'm in the same boat. I've looked around and there really isn't anything. You could buy some third-party joy-cons but you'll have the same issues.
Workaround for now is to make sure you have line of sight between the joy-con and the steam deck. Their reception is fine when unobstructed.
Where I live, we drive on the right, but pass on the left, so I do that. For stationary or oncoming obstacles, go right; for passing things moving the same direction as me, go left.