Is LinkedIn still a good site to apply for jobs? It's been almost 2 weeks since I've been applying for jobs, but still no luck yet unfortunately.

I used to use Indeed but typically got scams instead of real jobs.. I've also tried a few company websites directly, but no luck yet.

Any suggestions on the best platforms to apply?

Also, a side note, I'm wondering if it could be my resume isn't good enough as well? Any suggestions as far as how to go about improving my resume? I.e. Go to a particular agency to improve it, etc?

I'm a full stack developer with 6 YOE in PHP/JS (Laravel, Vue, & React primarily). Some AWS experience as well.

Thanks in advance!