Many people love misery in this country, when we were in the EU all we heard was complaints about the EU.
Now we are out all we hear is how bad it is out.
People don't like misery, but people like to say what they think, which is great. But, the problem is on social media (which exploded since the mid 2000's) three comments from random people can carry equal weight. You can have one is based on fact/ knowledge, one based on fiction (lack of knowledge), and one is a manufactured lie (usually based on knowledge, but directed to divert from the person's real motive/ issue).
I think a lot of people who were crap at their jobs or who overvalued their own skills were blaming the EU, whether that was politicians or all the way down to a guy picking fruit. Most of their problems were caused by our own inept politicians, our own policies and our own people.
Then there were also people who could make gains betting against the market or profiting from the failure of others, they also blamed the EU, to get us out of the EU, to create a personal gain. This only works for <0.1%, yet probably 20-30% think it applied to them.
The fact that some of these people used to blame EU rules, which we effectively wrote ourselves (within the EU, which the EU adopted) is what I find most funny. It's like they thought that us having the ability to write even more rules, solely for us, was going to make things better for us. The reality is, for the majority of the people in the UK, we would have been far better off if the EU had control over all of our rules, more than our own Tory government who are in place 2/3rds of the time. Having Labour in power 1/3rd of the time wasn't enough to dilute the Tory problem (not EU problem).
Some of our industries were failing (Coal, Steel, MAnufacturing etc), which got blamed on the EU, but it wasn't the EU's fault that other places around the world could just do this cheaper. The could basically carry out manufacturing and material production a lot cheaper, as they were developing, and could effectively pay less wages (a massive contributor to cost). Our Coal, Steel and manufacturing was always going to die off, due to wage demands, and we couldn't stop the less developed world from growing.
Anyone remotely independent wasn't blaming the EU when we were in, as there was no overall reason to blame them, being in massively helped us grow, and be competitive on a European and World market. Pretty much every single economist said we were better in the EU, the Tories did, Labour did, and every single Tory calculation on the brexit impact (post-voting out) showed leaving was going to be bad. The less ties we had, the worse it was going to be.
Some people have flipped sides but it's not many, maybe 10%, but the people who used to blame the EU have just gone quiet, and those who knew it worked have just kept saying the same thing which applied from before we left, as it's true.