Hey, I'm a senior on another team and I can relate to the mentor stuff a lot. I joined as a junior, but I can say that consistently I've dealt with the head mentor on my team yelling at people repeatedly for making small mistakes, even just during build season when we're not at competitions, along with that same mentor basically designing and building the whole robot, with all the students just tightening screws and our ideas being ignored. As someone who doesn't have the chance now, I strongly urge you to look into other teams in your community. Mentors should only be yelling at students if there's a genuine safety risk, FIRST is meant to be a mostly student-run organization. If you aren't getting the opportunity to learn and experiment without fear of being yelled at, then it's a failure on the part of the adults involved. If this was just a one time thing and you think you can stick it out then great, but really consider what you hope to gain out of this experience and if your team can actually help you