In almost 50 years of receiving the Sacrament of Confession, I’ve had confessors that I considered to be tough, who challenged me to do better, and confessors that I considered to be more lenient and understanding when it comes to human weakness. I’ve never had what I thought was a bad experience in the confessional.
The most frustrating experience, which has happened a few times over the years, is when I’m at the end of a long line of people waiting for confession, and the priest runs out of time and is unable to hear mine, usually because he has to say Mass which is about to start.