Questions like this kind of go back to that idea of therapist as teacher vs role model. Or idea that if your method is so good, how come it did not work on yourself? Like a pimple-ridden dermatologist, an obese nutritionist, a bankrupt financial adviser, an addicted addiction therapist, or a lawyer who has been often having trouble defending himself in court.

All this is further complicated by the fact that we know so little about our therapists. Maybe your wonderful therapist was married to a true biatch! Maybe your therapist was forced to marry a guy in an arranged marriage (e.g. as do some Indians, Africans, Orthodox Jews) and now she's finally in a situation she can divorce? Maybe your therapist finally came to conclusion that he is gay?

Though often the answer is none of the above, it's not a single thing, it's less extreme, just your regular human imperfections. It's the reality that therapists don't have the same level of objectivity and distance in their personal life. Because they can't. Due to stresses of family and work a therapist might overeat, they might develop obsession and even addictions, forget to take care of themselves, get depressed and anxious. Some have unresolved emotional issues with their parents. Between stresses of work and home, some even get burned out.

Yet in the session we don't know these. We're left trying to guess. More importantly, we don't know to what degree these factors do (if at all) influence their work with us in the session. Keep in mind, just cause you don't see anything wrong with a therapist, does not mean they're perfect either. They might have a crappy marriage even if not divorced. Which is why, in my opinion, it's best to go to a therapist who seems to have it together in the area we need help. Many therapy techniques won't work if you don't really believe in them. Having too many doubts is counterproductive. So it might be good to change therapists for our own peace of mind, but also not necessary to horribly judge the therapist we left. We just don't know what's going on in their body and in their person life.