As an engineer, the most soul crushing aspect of sales process is when people simply ignore your calls and emails. I hesitate to follow up because I do not want

As an engineer, the most soul crushing aspect of sales process is when people simply ignore your calls and emails. I hesitate to follow up because I do not want to seen spamming people and eventually all hope inside of me just shrivels up and just dies.I find rejections to be emotionally devastating. I would gladly pay for a sales guru/therapist who would listen to what I have been upto and tell me what I am doing wrong , what I am doing right and what I should be doing more.