Stuck in a company with no Git workflow, no PRs, and resistance to change😭

I joined a company as a DevOps engineer and found their Git workflow is completely broken. They use a single GitHub account for everything. Developers don’t have their own accounts. Everyone shares access by giving their SSH public key to the boss, who adds it to his account. There’s no GitHub UI usage, no pull requests, no code reviews, no branch protection. Developers push directly to random branches, and those branches sometimes go straight to p