Did you ever ask your agent to show you new developments? IF you asked him and he did not show and ignored your request then you are right, he is a bonehead. You are incorrect about your assumption of developers only giving agents 1% commission. In fact some developers exceed the standard which right now is 2.5-3.0%. Furthermore you could have used your Redfin agent to get a portion of that commission on the purchase you just made without having any effect on the price of your home you just bought.
My only advice to people, as their agent, is that to buy now is economically not a great thing to do, but there may be other reasons so I can understand that.
So anyways, I understand you are saying no agents ever showed me new homes. If you asked them to show you new homes and they did not then I would consider it their loss. You did ask them to right?
As for the hourly cost of what they make compared to what normal working stiffs make, yes it is an abomination. As a normal working stiff, my hourly rate working on much more challenging sophisticated engineering is a pittance compared to what your standard higher player realtor makes. However, first off I don’t believe your agent sold 20 homes and even if he did, recall his commission is split many ways. If he takes home half of it that would be good for him.
It sounds like your experience with agents is that either they did not listen to what you really wanted. This happens alot.