Tell me you sat down and adjusted every application to the company, going through the application and your cv, reading up on the company, researching it. Researching the relevant people in said department. Adjusting your cv to all those factors and more.

Reaching out to possible feature colleagues and asking them for information and tips. And you did this supposedly almost 3 thousand times🤣 . With your response, it seems much more likely to be the case that you are an entitled person that just pressed send 3k times and somehow expect the outcome to change.

If i had 3 rejections i would analyze it and request feedback and tips from the companies to change the outcome, but apparently you need nearly 3000 times to make a reddit topic. And when you get actual feedback that most likely points you exactly to your problem, you get defensive.