It seems to be a common problem. More control seems to come more easily the less realistic a LD is. This is because it’s easier to change your expectations to something unrealistic when your atmosphere proves than everything isn’t real. When your atmosphere appears to be extremely realistic, your mind goes into expecting realistic situations.
To help yourself out, you can go expecting more realistic things. For instance, something can appear behind a door because someone came and put something there. You can fly because in this dream world, gravity is reversed. Give yourself reasons.
Just keep stretching the limits of your expectations until you feel confident enough to be able to do something because it’s a dream.