I know how this feels. The reason why it's so easy is because you're able to have perfect movement in a single position (left, right)
If your controller doesn't have any grooves in it, i would suggest a bigger deadzone (this makes WESS harder though)
If the only reason for Ganondoor is chus, it's much easier (and faster) to either RBA poe for 29 chus or learn Skulltula vineclip in BoTW.
Let me know how it goes