You think Angela Rayner is a representative of the left of the Labour Party and movement?
Why - apart from sharing a flat with Rebecca Long-Bailey?
She has aligned herself with Starmer on all the key decisions so far. She may have personal ambitions to replace him, but she is not positioning herself on the left of the party to do it.
And what substance did you see in Starmer's speech (or his 14,000 word Vision For Labour) that impressed you so much? He skimmed over the big issues, waffled in print and in person, avoided policy ideas or commitments, broke all his leadership election promises, paid homage to Blair and Kinnock (I realise those were big pluses for you) and slapped Johnson with a couple of lame jokes! No charisma and no substance.