I think number 2 is incredibly pertinent point, and is a problem with today's politics. The right seem to campaign on being proactive, the left campaign on negative sentiment to the right. It's almost like one side has a vision, and the other says that vision is bad, and offers no vision of their own.
Number 4 id disagree with, id say the negativity toward Brexit currently would be to the negotiation failures, not the convenient idea they didnt know what they voted for. The protest vote was certainly true, but it was a protest vote for specific things.
There's a bit of a trend currently, of 'dont threaten me with a good time' and 'promises made, promises kept' with regards to right wing ideas that come to fruition, this is what worries me about Farage.