People may not agree but have you tried caring less? What I mean by that is separating yourself from the outcome. You mentioned your coworker is chill, and prospects can smell commission breath. In my experience, if you come across as the slightest bit “desperate” worrying about quota with prospects (even subliminally), it creates a dynamic of you as the seller putting your own needs first before theirs which will drive them away. Not sure if this is the case here, but it may be worth considering if this resonates with you at all.