If you received a request for feedback "whether positive or negative" did they ask you to volunteer comments? If so, then a separate page describing the 4 incidents seems totally in line with their request of you. "Thank you so much for this information" would be the response if it were any other type of business asking for feedback.

I personally believe it's really needed in the therapy business. I get feedback requests all the time from airlines, my car service department, etc.

If they asked for information, then it's not a complaint. If she's not your counselor anymore then what kind of contact or interaction with her do you expect to have? What would be the point of her contacting you? Would you feel guilty about writing the truth about your experience, from your perspective?

I believe therapists desperately need this kind of feedback, and need to be able to receive this kind of feedback. I'm old and have had lots of bad and ineffective therapy and the society is depending on these people and too often, in my experience, they just don't "get it". So maybe this will help a little bit somehow?