We tried that but the Tories just lied and pretended they were going to reduce it. We then voted Brexit as a way of forcing the issue but they've still ignored us. There aren't many other options open within the confines of democracy.
The people who lost the referendum are responsible for losing it.
The biggest difference between leave and remain voters is that most leave voters have now accepted that it was a bad idea. Most remain voters are still to accept that ignoring the wishes of millions of people for years on end got us into this mess in the first place.
Remain voters thought, for good reason, leaving was a stupid idea and were correct.
Leave voters thought leaving was a good idea and were wrong.
It is really that simple.