I quite like Python 3, and most of the backward-incompatible changes it introduced.
The problem is that the only significant wart that got fixed was Unicode. We still have the GIL, a very slow runtime, convoluted packaging, barely-usable lambdas, and limited typing. That's a pretty lousy payoff for 10 years and probably millions of engineer-hours.
Python might be making bad calls, but it's hard to criticized a process for failing to accomplish things it wasn't trying to accomplish.