Need help understanding strategy for off campus job applications

I've been sending out a lot of applications off campus and I keep getting rejected everywhere. Whats weird is I have followed all the rules and all of a good resume. On the free ATS score checkers I get a 70-75+ score too. Yet I don't get shortlisted anywhere. Everyone says tailor your resume according to the JD but a few questions arise. Firstly, do we only exaggerate our work by using different keywords? Or do we add in some exaggerated lies as well? I obviously know we shouldn't lie and make up experiences and all so till what extent should we lie?

Is there any best time to send out applications? How exactly do I mass apply and where? I have the Simplify extension at the moment that fills in job applications for me quickly. But I'd like to make it even more efficient and apply to even more jobs.

Also, should I start asking for referrals on LinkedIn? How do I determine what jobs would be good fits though? Because I wouldn't wanna waste anyone's time either. Also should I approach the HRs or the people working in the company for it? Which is preferred more?

Also, any tips or information from people who got off campus offers would be appreciated. Especially as to which portals are best and all.

I am a 2026 graduate. And seeing so many people who have graduated already being still unemployed is a bit scary and worrying. So please do help!

Thank you. And have a nice day :)