Re: Great Britain
"The rest of the world is holding us back" is the rhetoric of the likes of Putin and Kim.
Really? I can't imagine either of them admitting anyone holds them back. It's not what I said, anyway.
If what you said were even half-way true, our economy would be overtaking that of the EU nations, rather than lagging behind. In reality, we have a brain-drain, and many research establishments are in dire financial straits directly because of brexit.
In reality it's only 18 months since Brexit, far too soon to see the actual effects of such a huge change. During that we've had a pandemic, an energy crisis due to Putin, and yet all the doomsday predictions haven't come true. Financial staff are actually moving to the UK, nuclear fusion companies are setting up here (staying on track for the article), etc.
I've never seen any country leave a major political grouping and be instantly successful, it usually takes 10-20 years to even catch up, so no surprises there. If you think leavers excepted anything else it just reinforces that fact that you don't really understand Brexit.