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"I don't have unique content, and/or my content is unoriginal. Or, my content is low quality."

I experienced it myself when I tried adding Google AdSense to https://techinterviewexp.site.

Google folks don't even see what the site is about.

To be fair your site just looks like a link aggregator.

If you think there is value then start charging money from your visitors.

Your content IS low quality. It's an attempt to out-search Google for tech interview data.