Sorry to quote your whole post but it's easier as you've raised new issues.
First, your bullet points on feedback. Maybe take those with a large pinch of salt? Do you think those comments from men to your friends are honest? They sound like excuses to me. Are the men really going to be honest about you to your friends?
IF they are accurate, is what you're saying that you give off the wrong vibes- ie not interested when you are? There's a difference between your behaviour on date ,when you can show you like them , and 'chasing' when they appear to pull back.
For example with this man you started the thread about, when you said Good bye at the tube, it would be fine to say "I've had a lovely, day, call me/ message me if you fancy doing it again." So you'd clearly be saying you enjoyed it but putting the ball in his court.
When you thanked him afterwards by text that could be seen as polite but not very encouraging. You could have said 'Let's do it again sometime.'
The too busy to see them- no, that's an excuse. Maybe they feel threatened if you've got a good career? OR if you put them bottom of the list when it comes to seeing them. Do you?
I think you should focus on meeting men through activities like walking, sport, holidays, charity stuff, clubs for common interests.