In 2019, Brexit was stuck, May and a big dollop of the Conservative Party were reluctant to enact what the voters had voted for. Boris came along and promised to get it done, and he did (nearly).
After that, Boris was a complete dud, and his own party got rid of him (because he was toxic). Then elected an even worse leader and Chancellor. Not sure Sunak is any better.
They cannot run their own small party, so it is no wonder they are a shambles in Parliament (and the country suffers).