I'm not voting for Starmer because ; He isn't enough like the Green Party, isn't a Scotish nationalist, isn't as leftwing as Corbyn, isn't in favour of PR, isn't anti Brexit.
You wont get a Labour government unless you vote 'for' them be that directly for a Lab candidate in your constituency that can actually win or tactically to keep the Tory candidate out.
That all begs the question, on current showing do you actually want a Labour government? Sadly for my 40 odd years of Labour voting I don't know, I dont know who or what focus group they represent anymore.
As a generalisation failing to vote Labour
is enabling a Tory majority.
https://commonslibrary.parliament.uk/general-election-2019-marginality/
Of the 650 parliamentary constituencies, 67 seats were won by a margin of 5% or less of votes cast. This is 30 fewer than the 97 won by such narrow margins in the 2017 Election.
The number of very safe seats increased slightly, continuing the upward trend seen in recent elections. Seats won by a margin of over 50% increased from 35 in 2017 to 37 in 2019, while the number of seats won by a margin of between 45% and 50% increased from 29 to 31.
In the 2019 election however, the number of three-way marginals greatly diminished, and those that did occur were not so concentrated in one part of the UK. 17 seats had a vote-share gap between first and third place of less than 20 percentage points and only three of these had a gap of less than 10 percentage points. The 20 closest three-way marginals in the 2019 General Election are shown in the table below.
The Brexit Party was involved in five of the top 20 three-way marginals. In all five of these seats, Labour won and the Conservatives occupied the other spot in the top three.
In three of the London seats featuring in the top 20, the Liberal Democrats’ vote share appeared to be boosted by the candidacy of high-profile defectors from other parties: