You could argue it's a deal that some Brits voted for, but definitely not all Brits of course.
Only 51.89% of those who voted in the Brexit referendum in 2016 voted for Brexit.
In 2019 there was a general election, and during that election campaign, Boris Johnson promised to "get Brexit done", but only 43.6% of voters in that election voted for Johnson's party, the Conservatives. So a majority of voters in that election voted against the Conservatives.
It would have been possible to leave the EU while staying in the single market and/or customs union, but the Conservatives chose a particularly hard version of Brexit, cutting more ties than necessary with the EU.