I don't consider him dense - but he's finding himself completely out of his political depth. He's clearly very intelligent, but only in a very narrow field of legal expertise.
Evil? It's a strong word, and no, I don't consider him evil. There are evil politicians strutting around the world stage, but, no, Starmer isn't one of them.
He is - as someone else has said - deluded about the nature of British influence and the nature of how Britain is viewed post-Brexit across Europe (they consider us irrelevant). Equally, he's trying to play up to the section of the British public who still believe we have a military force to be reckoned with.
This will play out very, very badly for everyone.