I am not getting any response or reply...

Hey, I am a recent b.tech graduate and looking for an Opportunity, but every time I apply and the majority of time no responses but if I get any response then it is like we are not moving forward with your application. It's been 4 months since I passed my bachelor's degree. Still I haven't got any chances for an interview. it doesn't matter if I am not selected or not but at least I want to know where I am lacking or need improvements . Sometimes I feel like I am worthless, and have no purpose in life... What should I do , is it common?