if you look at his record, he clearly doesn’t give a fuck about anyone with darker skin than himself.

Let's look at that record, then.

As a barrister, in addition to the pro bono work defending Caribbean people from the death penalty, which !Womble@lemmy.world has mentioned, Keir Starmer also opposed the Iraq War, marching against it and issuing legal opinions against it. Being opposed to a war largely waged against people with brown skin suggests that he does, in fact, care about at least some people with darker skin than himself. Indeed, even some of his more controversial positions, like defending Hizb ut-Tahrir show the same: he is clearly willing to go out on a limb to defend the human rights of non-white people (I don't personally think it's controversial that even terrorists need legal defence, but then nor does Keir Starmer).

As DPP, Starmer did important work tackling FGM, which mainly effects women of colour. He also introduced policies which led to an increase in the number of BAME people working in the CPS. EDIT: Forgot to include this one about his work on the Stephen Lawrence case.

On becoming Labour leader, Starmer appointed the most ethnically diverse shadow cabinet in history (it's been reshuffled since then, but as far as I can tell, it's still very diverse, e.g., Lisa Nandy was demoted, but David Lammy was promoted, so the 'net' diversity was the same for that move, Thangam Debbonaire and Shabana Mahmood are both still there, etc.). Starmer has continued his work with Baroness Doreen Lawrence, appointing her as race relations adviser. Labour has implemented nearly all of the Forde report (old article, but I couldn't find anything more recent), which includes training on anti-black racism.

We'll have to wait to see the full manifesto, but Labour are planning some sort of new race relations law, specifically aiming at achieving equal pay. Finally, the next Parliament, which will probably be mainly made up of Labour MPs led by Keir Starmer, is going to be the most diverse ever.

Also, this isn't directly down to Starmer, but I think it's at least worth noting that both Scottish Labour and Welsh Labour elected their first BAME leaders during Starmer's tenure, which hardly seems compatible with your argument that the party is currently led by a racist.

So, yeah. I have looked at his record, as you suggested. It's pretty clear.