No it won't, the Tory Party will survive and might even win in 2024/25, polls will narrow (they are starting too now) and the Tory press will go into overdrive against Labour, just as they did against Brown, Miliband and Corbyn, esp in the 2019 GE.
Also, generally speaking, Brexit voters aren't waking up to the damage they ve caused, they don't care... but they are dying, replaced by younger pro EU voters.
But don't underestimate the avg British voters desire to vote against their own best interests, so cost of living and inflation, public services have collapsed, the NHS is a disaster zone, roads, schools/education, strikes... despite all this, many polls give Lab just an 11 pt lead.