"Quitting" not fired. That's non-sense.. Good to great sales reps stay and reap the rewards of their success, the average to crappy sales reps quit before they are fired (because they know they aren't hitting their targets which means no bonus and thus, time to move on). There's always high turnover in sales reps positions.
3,5 years??? What are you talking about. Sales rep turnover is common and expected, and I can assure you the good ones stay and the crappy ones are shown the door.
The RVNC sales force launched in AUG 2020 selling the RHA line of fillers awaiting DAXXIFY approval which was held up due to FDA delays with Covid and then the CRL setback.