Just to put this in context, the last time as you say a "full left" government ruled, over the span of six years we:
- Built the NHS
- Decolonised India, Pakistan, Burma, Sri Lanka, and Jordan
- Nationalised the coal industry, electricity utilities, railways and long-distance haulage
- Established a national childcare service
- Paved the way for the creation of National Parks and introduced public rights of way
There is a lot of progress that can be made with a genuine left-wing government with a majority, even in a time of economic upheaval. With Reform splitting the right-wing vote this is the best opportunity the left has had in my lifetime. But Starmer is in the lead, banning MPs from attending strike pickets and talking about how he's had to give up his pledges on the NHS in order to "grow the economy".