This does not add up. After they fired you and then had you fight to get your job back, you said they hired a "coach" to help you learn new skills. But at the end of this training, the coach reported to your boss that you "had a long way to go." It certainly does not seem like the coach was hired to help you out. It seems like it was just a backhanded way to get an assessment on you while you had your guard down.
To me, it seems like this company was just taking advantage of you and your youthful enthusiasm until they had no more use for you. By blaming yourself, I feel like you are drawing all the wrong lessons from this experience.
This does not add up. After they fired you and then had you fight to get your job back, you said they hired a "coach" to help you learn new skills. But at the end of this training, the coach reported to your boss that you "had a long way to go." It certainly does not seem like the coach was hired to help you out. It seems like it was just a backhanded way to get an assessment on you while you had your guard down.
To me, it seems like this company was just taking advantage of you and your youthful enthusiasm until they had no more use for you. By blaming yourself, I feel like you are drawing all the wrong lessons from this experience.