NATO has fed all its weapons system into Ukraine at just the right pace for Russia to, one-by-one, learn all of their capabilities and develop countermeasures, without changing the outcome of the war in the slightest.
The outcome of the war was changed when they didn’t just invade via the airport, take over Kiev and shoot Zelensky in the first day or two, and Zelensky didn’t just skedaddle to avoid getting shot. Nobody expected it to go on for two years and counting.
For Brandon, however, dragging it out forever is a good thing. You’re right that Brandon is slow-walking aid, probably with the intent of familiarizing Russia with weapons systems, among other things. But UK is a different matter, and this dragon thingy seems to be just what Ukraine needs right now.