I said in another comment but basically the left have a tougher message to sell than the right. The right says that the system works but it's the foreigners/benefit thieves/refugees stealing your money/house/jobs. That is inherently quite easy to understand without much thought or critical thinking. The left on the other hand have to tell you all about Thatcher, Reagan and neoliberalism before we even get to the point of solutions which are usually incredibly radical like changing the fundamental economic model we've all been operating under since the 80s. Inherent in that is a fear that the left's solutions will take assets and wealth away from people. While the right promises that your assets, wealth and property rights are sacred and that it's the "other" that will have their assets, wealth and rights taken away. Again, very easy-to-understand messaging for the right versus the left.