Hi Avneet,
I need you to remember that you are your own person and not defined by what society tells you. It was your decision to join that institute and you need to own up to it. Learn to block out other peoples' opinions, especially hateful and demotivating ones, and keep your head down and focus on your work. It does not matter which coaching institute you are a part of or for that matter, even if you haven't joined one. Your hard work and determination to your task is what will grant you success, not those people. They do not pay your bills, Avneeet. Learn to disregard their negative comments and focus.
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