PM calls for end to ‘self-recrimination and wetness’ over BBC Proms song stance

The speaker expresses frustration over a reported decision by the BBC to not sing 'Land of Hope and Glory' for ten years, a tradition at the end of a specific event. They argue against the embarrassment over cultural history and traditions, advocating for a cessation of self-recrimination and a more positive view of cultural heritage.

What does the speaker mean by 'self recrimination and wetness'?

What is the overall message the speaker wants to convey?