Compression gloves squeeze the entire hand evenly. Same pressure on your pinky as your thumb. Same pressure on the back of your hand as the joint that's actually sliding. The compression isn't where the problem is — so it "sort of" helps for twenty minutes, then stops.
Wrist braces lock the whole wrist down. They might help at night when you're sleeping, but the moment you sit down to knit, you can't move your wrist or your thumb. You can't pinch a needle. You can't hold a coffee.
Rigid thumb splints stop the sliding by locking the entire thumb in place. The pain stops, but so does any chance of knitting — you can't pinch a needle in one of those either.
Cortisone shots, NSAIDs, kinesiology tape — all of them reduce the inflammation around the joint. None of them stop the joint from sliding. So the moment you knit again, the cycle restarts.
In fact, relying on these too long can make things worse. Because while you wait for the inflammation to settle, the cartilage keeps wearing down with every pinch.