It's really just a question of practice....
Think back to when you were first trying to go toeside...
You were probably as bad then, but insisted becasue you needed to know how to go toeside at least one way.
It could also be the angle of the chop compared to the wind messing you up.
Anyway work on it when you are really powered up.
I've been riding a real small Directional board a Spleene Zone and despite doing fine toeside on
a twin tip I was no good toeside on the Zone. Now I can almost go upwind better toeside than
heel side on the Zone. I just kept insisting. Now I like you have to work on Toeside the other way.
Start by getting it down while going downwind, even very downwind. Do that by doing a downwind slalom sort of thing. Then carve more each turn until you just hold your ground.
Soon you will be an ambidextrous toe-sider