Everything. Stop allowing one manager to give out lesds. Makes mmo sense
Change management team. Get 360 feedback from sales reps. Stop nepotism and revenge.
Completey change culture. Get rid of managers that have been there for over 10 years. Change the meat grinder mentality. Respect sales reps and their opinions. Stop extreme nepotism. Managers to sales reps. As long as you have been there for 10 years you will get best leads.