Job searching sucks!Hitting a Wall Even with Skilling Up and ATS-Friendly Resumes

For the past few months, I've been tirelessly job hunting on LinkedIn. I've taken courses to skill up and tweaked my resume to be ATS-friendly, but my applications are still mostly going unread. It feels like the only people getting interviews are those with connections within the companies. Unfortunately, I don't have anyone like that to vouch for me. Has anyone else been through this? What strategies did you use to overcome it? Are there other job platforms or networking tips that worked better for you? I'd appreciate any advice or shared experiences.