Sometimes it is personal and sometimes teachers do play favorites and while it is not some conspiracy everyone who has been in school knows that. I have been personally told by a teacher (in the dark ages of high school) that she did not like me. She made a lot of assumptions about me that were very unfair and inaccurate and while it does not "haunt me to this day" it has bothered me on and off over the years.
My eldest son had a teacher that did not like him. You could see it when she interacted in the classroom with him. The same year my second oldest had a teacher that adored and favored him. We gently spoke to both of them and it got better on both sides. Teachers are human with human thoughts, belief and feelings. They do like some students more and some less. We all encounter people we have those feelings for every single day in all of our workplaces.
My eldest son had a teacher that did not like him. You could see it when she interacted in the classroom with him. The same year my second oldest had a teacher that adored and favored him. We gently spoke to both of them and it got better on both sides. Teachers are human with human thoughts, belief and feelings. They do like some students more and some less. We all encounter people we have those feelings for every single day in all of our workplaces.