30 responses saying "I can't believe you don't understand Starmer's lack of popularity is down to this ONE thing" before giving 30 different answers. I stand by my point.
I think by definition you don't survive "multiple blunders" -- just one (like the mini-budget) is enough to get you ousted. If there are multiple errors, I would suggest they are not blunders.
Ok, so he did a lot of dumb things, no single one which would have killed his premiership, but the combination of sever or all of them was more than enough.