How To Piggyback Authority Websites

there are some competitors that use site.google.com or medium or pinterest and rank in position one or two but when i make account on these sites and produce even better contents I don't see any result. pages even don't index in google



ahref result for these links:
just started to get backlinks one month ago but it was on SERP since July .


what's the trick ?
any suggestion?

Share your links on social media and add a couple of backlinks. Let the Google crawler find your pages that way.