Thank you so much for the helpful and constructive suggestions!
Here is the revised version:
"[cat’s name] is the most loving and cuddly cat. She’s easy to look after and I very much enjoyed spending my time with her. She’s very curious and loves to be with you all the time.
The communication with [owner’s name] could use some work, though. We confirmed the sit about a month in advance, yet at no point was I provided with written instructions, in spite of having asked for a welcome guide. The dates, the instructions, and the expectations constantly changed because she’s unpredictable and changes her mind a lot. I also felt she was treating me as if I was her employee.
I actually learned I would be sharing the flat with her roommate the night before I arrived, as there was no mention of him during our more than an hour long videocall. She does not seem to trust her roommate so everything, including the closet with the cat’s food, is under lock. At night, I was instructed to lock myself in the room with the cat. She also kept asking me about her roommate: whether he was in, if he bought toilet paper, etc.
There is an indoor camera I saw when I arrived too, she said she wouldn’t use it, however it was never disconnected.
She likes to receive at least 3 updates a day and gets upset if she has to ask for them. She messaged me within every 4 hours tops demanding an immediate update.
I understand this was her first time using the platform. Nonetheless, I am afraid I did not feel comfortable or treated well and, even though I loved the cat, I would prefer not to go through the anxiety and stress I experienced again. She mentioned that for upcoming sits, she will have the sitter sleep on the sofa in the living room area and that only the cat should go in her bedroom. Also, bring your own towels."
Re. the rating: I set cleanliness to 4 (it was overall clean but when I arrived the toilet was dirty and she complained about me having left the top lid up --which I did on purpose so she’d see it was dirty and clean it-- but didn’t clean it, I ended up doing it), communication to 2, hospitality to 2, pet behavior to 5, accuracy to 3. Overall, 3 stars.