The idea that we 'joined a trading bloc' which later got subverted is, in my opinion, a myth.
I'm also not convinced that we're going to suddenly find ourselves in a more meaningfully sovereign position outside the EU. We will be highly exposed to political and economic forces that are outside of our control. When negotiating our new trade deals with the rest of the world, for example, the simple reality of our position means we're going to get dictated to. We'll also still be members of NATO and WTO, which do infringe on our sovereignty (but apparently aren't as serious a problem for Brexiters).