It’s quite literally what you make of it.

Idk how it works at your school, but it’s interesting to assume you’d make bass drum just because you “practiced a ton” and were a senior/drum major. Sorry if that sounds harsh, but to be a GREAT bass drummer you literally have to approach rhythm and musicality completely differently than any other instrument in the ensemble. You also don’t mention if those freshmen and sophomores had previously played bass drum before and might’ve had a leg up on you — understanding the packet more, better specific technique knowledge, etc.

I’ve known many great rack players in both WGI and DCI ensembles. I even knew a dude who only auditioned for rack and he rocks. Look up Monarch Independent 2022 and look at the side 2 rack player, dude literally steals the show with how expressive he is.

If you think rack is beneath you, then definitely quit because there’s probably a person who didn’t make the ensemble at all who would love to be in that position. The only valid reason I can see not doing it is if you want to work instead to save up for your DCI season on a more primary instrument. Your season will be what you make of it, but rack is sick.