Hi Michel,
You know this is not a copy issue.
That's a nice solid salesletter (and you know I don't make that statement too easily).
You're just too much of a nice guy.
I have a simple suggestion.
You have preeminence in the market of online copywriting.
In the field when you talk about online copy you talk about Michel Fortin.
You don't need to bother with clients like this.
In fact you should have a list of requirements you give to clients before you'll take work from them and one of them is the feedback you expect if they don't like your copy.
The biggest rule you'll ever learn in life is that you can pick and choose who you do business with.
Your time is all you have and you don't want to waste it away on people who don't give you the respect or the treatment you need to help them.
FIRE THE CLIENT and move on.
There's no need to be Mr Nice Guy all the time.
You have the skill to make a few selected clients VERY rich.
Capitalize on that and get rid of the clients who are difficult to work with.
At least that's what I'd do.
But then I can be an arse at times and I know that's not YOUR personality style.
Kindest regards,
Andrew Cavanagh
Freelance online copywriter