I wouldn't quite call it "anime anxiety" in my case, but similar to your experiences, I can only watch a few episodes a day, due to multiple reasons. The main reason is of course, that it collides with my schoolwork and thus when I'm watching, I feel like I'm wasting time, but secondly, I simply can't look at screens that long. It just bothers me, or maybe irks with my eyesight. I also hardly ever watch TV and when I watch movies, I can't sit still because one movie is an extremely long time period for me. Thank all the spiritual deities for those 50 minute anime movies.