I have scored 80% in class 12 boards & my NEET 2019 has also gone worst. My career is thrashed... Should I sucide?

No, do not do that. You might not have done well in NEET but remember that NEET is not the only exam in life. Besides, you can give NEET not just once but several times. So if you could not do well this time, prepare for next year. Analyse your strenghts and weaknesses. Work on your weaknesses to turn them into your strength. Work on your strength to maintain them. You always have a way out. Yes, there are times when people feel, this is th e end, nothing can be done and there is no way out. But believe me, this type of feeling  doesn't last long. Because, very soon our brains work out a way to handle the situation, even if it is the worst of all. Our brains can find the solution to everything. It just needs some time to work out that solution. So give your mind the time to work out a solution for your situation. Have faith on yourself and your mind. Let it relax a bit. Relaxation will help it to find better solutions. Don't rush into anything like suicide. Don't even contemplate it.

You are not defined by your failures. You are defined by what you do about your failures. You are defined by how you bounced back to success after failure. Failure is just a lesson ,not the  final verdict of life. Failure is just an opportunity to begin again, this time more intelligently.All the very best! And do let us know how are you now. Ask any doubts you have. We will try our best to help you out.

Not to bother about that, the exams are about only testing yourself .....I think you have interest in other things ,,,, follow in which you are interested and lead a successful life ...Thank you!