Getting to the top is hard
Algorithm changes all the time, this is ancient history, websites periodically got slammed back in the day as big updates crushed sites.
Other search engines are available. Google is popular for a reason. It gained market share early, the job of an SEO expert like me (SEOpremo) is to unravel the ranking algorithm and reverse engineer it. Did Google squash a competitor? Perhaps then, but I can’t see it happening now (for commercial results anyway) as to many eyes are on them.