Linux is a tool that big corporate entities have profited greatly from for many years, and will continue to. Same with BSD, Apache, Docker, MySQL, Postgres, SSH…
Valve, Sys76, Framework, etc. Are proving that using Linux to serve an end user market is also profitable, and are capable of supporting enterprise use-cases.
I understand that there may be specific problems to solve wrt improving adoptability, usability, compatibility, etc., but Linux is doing more than ok within the context of the FOSS ecosystem (and increasingly without).
Your thinking is slightly skewed, IMHO. Linux doesn’t have an inherent incentive to compete with MacOS or MS, and if it did, it would be subject to the same pressures that encourage bad behavior like spying on users, creating walled gardens, and so forth.