Is what the questioner did, submitting hundreds of job applications and trying to find work through acquaintances, considered sufficient effort in seeking provision?

Sustenance is preordained, so attach your heart to Allah and trust in what He possesses, for all matters are in His hands. The greatest cause that comes between a servant and sustenance is sins, so repent to Allah and adhere to His law. Material means are important, so do not abandon the search for a suitable job, while your heart remains attached to Allah, who is the orchestrator of means. Do not fall short in taking material means with your limbs and relying on Allah with your heart, and trust in Allah's choice for you.