You say you are now in a position of leadership. Unless your team automatically puts seniors in leadership roles, it sounds like your work/dedication/skills are being recognized, if not specifically called out. I ask you to consider whether you are expecting more/different than the mentors are going to give.
Also, while who716 said it rather callously and hypberbolically, there’s a bit of truth there at the end.
FIRST mentors are mostly volunteers, and the vast majority of those paid are paid by schools and sponsors, not FIRST. Apart from the YPP, FIRST has no real indoctrination program for mentors, and most mentors only meet people associated with other teams at competitions, where they are often more involved in running the team than in sharing best practices with other mentors. Every team will be run differently according to the personalities involved. If you want to change your team, you can do it from within, or by reaching to the primary sponsor of your team (school, 4-H, whatever) if it has one. FIRST has (apparently intentionally) not created much leverage over the team structure, and Chief Delphi has none at all.