I am someone who has a side hustle. My main job is nice, but what I do in my free time is truly rewarding. Mostly.
I have a client right now I'm designing wall art for, and I'm communicating with their marketing staff to get things finished. She's a nightmare client. Might be worse than what I deal with in my actual job.
She has not provided any (much needed) resources or information, and takes 2 days MINIMUM to respond to my emails about my work. Now she's making me look incompetent to her colleague, despite the fact that the mistake is on her (approving a design that doesn't coincide with the branding). She's the laziest woman I know, and tries to be smart with me despite all the stuff I know about her and her laziness.
I'm about to send a snarky email but I don't know how to say “you suck at your job, you're lucky I love your boss, this is why no one wants to help you”. If I could get some examples, I'd love it. I'm not taking on anything of this magnitude as a commission for a long while, she's ruined it.