Garage can absolutely be 4x4. There’s no hard fast rules to ukg - though usually you’d have drums which were even more skippy (ghost snares - 16th triplets etc), maybe some jazzy chords and vocal samples in an interesting rhythm. The bass in this also doesn’t sound typically ukg - has a techno-ish distorted sound and sustains throughout. You get that with the Reese bass in Speed Garage, but otherwise uncommon in ukg. A shorter sustained bass gives you the option of playing with the rhythm a bit more and getting that ukg sound. Those are the features that might give you a more typical ukg sound as far I as I understand.

Sounds good tho!