Have to switch therapists again

I've seen enough therapists to fill an intro psych class and I've never left one by choice. Between multiple moves, therapists leaving the practice, and the "I'm not experienced enough for your case" talks, I'm so tired of starting over. I've finally gotten established with a new therapist where I live and have been seeing her for a few months - now she's very suddenly leaving her practice. She told me today that she's leaving and that today would be our last session. Just last night I'd been talking to my partner about seeing if any other parts wanted to finally talk in therapy.

It's really disheartening having to switch again. We have trauma around therapy to begin with (thankfully compartmentalized enough that most parts can begrudgingly accept us going). We hate having a lot of people who know our story, especially people we can't "keep track of." We hate feeling used, and this past therapist basically thanking us for being a learning experience for her feels bad even if it was meant positively, so it's bringing up some feelings of dehumanization too. We hate feeling too complicated or like people will always leave us. We have parts that feel like this is evidence we shouldn't tell people what happened because they'll just end up leaving and you won't get anything out of it anyway. We had a part who was finally wanting to talk to the therapist, the first time ever talking to a therapist (or anyone at all really) for that part, and now that part feels defeated and let down and wants to leave therapy to the host going forward.

It's just exhausting and feels like we have to start over again. I hate the process of finding and meeting with someone, going through my history and trauma, getting comfortable. Parts feel like there's no point ever engaging with the therapist because they don't last and they don't want to be seen by someone that won't stick around. I'm just so tired of it and feel awful for the parts who are taking it harder. We're trying to see it as an opportunity to meet someone better, but it's hard to shake off the hopelessness.