Why do you need to hide yourself because some people did not help you? If I get what you’re trying to say, you want to make your profile blank just cause someone didn’t help you?
That’s so unnecessary and completely illogical. I am assuming you have graduated recently cos you said placement. This is how the world is, not everyone will help you, in fact, one only very few will. As you progress in your career you will meet some really vile people and managers who will make your life hell. You can’t go into hiding for that.
Focus on yourself, there are no friends that will always help in life no matter what. I’m pretty sure even we don’t, everyone has themselves to take care of. Grow up and think about things that actually matter like your health, family, finances, helping out in society and improving yourself