I'm only commenting because I myself do this quite often. I'll be very verbose and break into parenthesis for almost no reason. I've noticed a trend lately in my writing that may help you: my verbose emails get largely ignored. I can ask for 5 things that are clear as day to me and get barely a response for one. I've often said the same thing in emails multiple times until the other party finally understands. This is as a full time employee talking to coworkers and partner companies. I would likely blow my brains out if this occurred with every customer.
It still happens now but I take the time to prune every email. I may take 3x as long writing multiple drafts until I can be concise and clear. One of my biggest pet peeves is repeating myself, second is getting a response confirming something I said 5 emails ago. The amount of wasted energy is soul crushing when I think about it and this is a daily struggle. I do write for myself but when that point comes when no one is really reading the response you give, you start to question responding in the first place. That's a terrible place to be.