What are some signs that a therapist may have poor boundaries with their clients?

Off the top of my ancient head:

Session-expressed curiosities about client details not relevant to the therapy.

Obsessing about clients outside of work hours.

What are some common examples of condescending behavior?

Frequent phoning or texting of clients to “check up on them and make sure they’re OK.”

Sense of competition with persons who are important in the client’s life.

General Introduction to Boundaries from Panahi Counseling:

Why do people hate fat people so much, even people who aren't exactly supermodels themselves? It seems like such a deep, passionate hatred, like they're offended by fat people just existing. Fat people didn't do anything to them, so why hate them?

Eager anticipation (or anxious anticipation) of the next session in ways that distract.

Struggling with fantasies of deeper connections with clients, whether sexual or parental or other intense or intimate relationships beyond psychotherapy.

Serious disappointment when the client cancels a session.

Have you ever been physically attacked by a demon?

Failing to mention the client in supervision/consultation, out of fear the supervisor/consultant will advise return to ordinary healthy boundaries.

Disclosing feelings, fantasies, and experiences to the client in ways not related to the work the client is engaged in.

These items can happen fleetingly, briefly, in any therapy, but if they’re frequent, it’s definitely time for the therapist to get some good, solid supervision/consultation.

Why are men today so pussiefied?

Routinely going over the time limit with certain patients, compromising the time for the next client.