" In fact, the UK, as one of the largest and most influential member states, plays a significant part in drawing up the laws."

Had your argument any merit there would have been no need for brexit.

It's not an argument. It's a rock-solid fact. The UK enjoys the third-largest voting weight, i.e., voting influence, in the EU. Only Germany and France, both with larger populations, have more weight. By the way, there IS no need for Brexit.