"My conspiracy theory" is a set of facts that you and the source you cited (whose so-called "fact check" was mostly attempting to put into context) find really inconvenient. Fact 1: Starmer and his party are polling badly. Fact 2: Starmer and his party delayed several local elections, many of which were in constituencies where they currently hold power and won't afterward. This is not a good set of facts, regardless of how little those elections matter.