I don’t have much to add that others haven’t already said, but don’t get discouraged. I just switched jobs 5 years post graduation and applied to roughly 320 positions. Out of those, I received about a dozen interviews and 2 offers. All applications submitted between September and November, and there are still more than 100 that I haven’t received a response from. It’s a numbers game. I will say, I had more success with applications made through a company website rather than LinkedIn.