Current T said he's "been through the same thing", then proceeded to explain his experience. He is not bipolar (he said this himself), and his example of him being "depressed" was simply sadness because he broke up with his gf.

So, any therapist who says they "know what it's like" is a red flag unless they've specifically gone through the same exact thing or something highly similar. That means the therapist is either intentionally/unintentionally belittling you or they have no clue what they're doing