Just look at the AI act, GDPR, and how the EU shot their tech sector in the foot with these.
If being in the EU was so great then why don't Norway or Switzerland join?
I am an EU citizen and it is extremely convenient in my personal life (common currency, no visas, my sim card works everywhere) but I'm also aware that the most effective governments are city states such as Singapore or heavily decentralized states like UAE, Switzerland, Denmark, even China and up until recently the US and UK. The EU creates far more regulations, red tape, and friction than the single market removes, and tying the fate of the UK to dying economies like Germany and France does no one any good.