First, I recommend taking a few deep breaths. You'll get through this
Second, read back on the post you just made. As a third party, it comes off to me as whiny. Its not bad to be frustrated, but the way you communicate frustrations can have huge implications on your effectiveness to navigate conflict.
Third, I recommend talking to a level-headed adult (preferably outside of robotics) about how you can be a positive contributor to this problem-solving opportunity (aka getting your entire team, both students and mentors, on the same page and working as a cohesive unit).
Fourth, take the new-found wisdom from aforementioned level-headed adult and schedule a time to sit down with your lead mentor/teacher and these two mentors you have conflict with. Aim to find solutions to conflict that include compromises to both parties so your team can land at a happy medium.
I know sitting down and "just talking" in the middle of build season might seem like a waste of time, but trust me, its worth it!
-Mike