Have you read “Fall Out” by Tim Shipman (Times journalist)? In it, he writes that after the last GE - when Corbyn did not lose anywhere near as badly as most thought he would - Blair put his head in his hands and said “I don’t understand this country any more”.
Most of the young Gen-X/old Millennials (so 30-45 I guess?) who would have voted Blair seem to have joined the Lib Dems, but that party is on the ropes. The Tory party seem to have moved as far away from Blair as they can, albeit on a different axis. Politically, the country is in a real mess right now from the perspective of anyone who liked left-wing social policies combined with centre-ground economic ones.