Good work :)
19d: oops! you're right it should be (3,3)
2d: A bit convoluted I agree. I was playing with '5 or 10%' or 'Es and Fs' but went for 'less than half' as the definition and a take on 'Depressed men' as the cryptic part. I was also hoping to excuse myself with a '?' at the end ;)
21d: I think you might have the wrong answer. It's definitely one word and it is the past tense as indicated by 'did' in the clue.
You can always check any solutions with the 'check' button to the left (self restraint encouraged!)
Glad to see my puzzle make it across the pond :)