ASSN10's journey

I graduated recently and have applied to nearly 700 jobs, but I haven't received a single screening call. I'm starting to wonder if my resume is the issue. I make sure to tailor it for each job, aligning it with the job descriptions and incorporating relevant keywords to pass the ATS filters, yet I still have no luck. I've been advised that the current IT job market is tough, and there might be concerns about my need for sponsorship as a non-US citizen, which could be deterring recruiters. I'm seeking guidance on what I can do differently to improve my chances.