He didn't get lucky with the implosion of the tories, he directly caused it. It started with partygate and the setup of johnson over several weeks. This trapped johnson in a series of lies. This led to him misleading parliament, the investigation and, along with the sex pest bloke, got Johnson deposed as PM. In a couple of PMQ's after Johnson had told another lie, Starmer responded with "We'll leave that there for now" then 2, 3 or more weeks later, he would come back to it and catch anothe lie.
His demise led to Truss, which led to Sunak.
To be honest, if you can't see that starmer is directly responsible for the fall of the tories then it is really pointless discussing it with you, you can't see the obvious because you don't like him, and thats fine, just doesn't make for open and honest debate. This was what I was alluding to earlier with the repetitive arguments on here about Starmer.