Was it wrong of my sister to say that she thought my therapist was patronizing and insincere?

Depends on the situation. I only find it "wrong" if she said it to be malicious. Otherwise, she gave her honest perception of the situation. I'd feel patronized if someone said that to me tbh. But also this is something between siblings, not strangers, so our opinions mean even less than hers in the end because it's a perspective from even further on the outside

Yeah, that's kind of shitty, like she's just trying to feed your irrational insecurities.

What people say, it’s their perception. Let your therapist do their job. What your sister says is irrelevant. She doesn’t know how to deal with someone undergoing therapy. Maybe she needs some of it.

Is this the same therapist that you were having concerns about ?
Generally speaking, the only person who needs to be satisfied is you, but at one point you weren’t happy with her. So if this is the same person, your sister might’ve picked up on what you had already noticed.

Just keep in mind your sister is not a therapist 🙂

What about you. Do [b]you[/b] think you're hard working worthwhile and creative?

Your sister sounds like she likes to give irrelevant opinions.