It's my impression that even when therapy ends successfully, sometimes former clients just need to go back for a some short-term support on a specific issue. Maybe a reminder that they have the ability to handle a new situation or a new perspective without having to get into heavy therapy again. If the therapist was unwilling to do this or thought it would be counterproductive, s/he should have made that clear, including the reason why and what the therapist thought would be the best way to handle new challenges that come up. Just because the way a message is being delivered is polite doesn't mean that the undercurrents are healthy.

One concern I have is, you went back with an issue, anxiety about a new job. Was that issue addressed or is the anxiety still there? Even if you don't want to go back into full therapy again, maybe seeing another therapist for short term therapy could help.

You have my support. At best, I don't think the therapist communicated adequately, whatever the reason for the sudden termination.