The reason it's super hard is because you are effectively trying to change company culture when you don't have the power to enforce it. You effectively turn into "old man yelling at the clouds".

If you have actual sway (buy in from those in power) and a mechanism to enforce it (rejecting merging code in and others not bypassing that), then sure you can change company culture, but that is extremely risky. You are burning through social capital very quickly, and some people will simply refuse to play ball and would have to be eventually let go. You will get into hot water once or a few times over this, and if you do it wrong or are unlucky, you can easily let go yourself if those in power lose faith in you. For this, you need not only a high position in the company, but also paid to compensate for the risk.

Very few developers, even in this sub, are at that level. It isn't a technical or code kind of problem, it is an organizational problem, and to fix that requires changes on the organization level, not at an individual contributor level. If you aren't at that level, it will be an uphill battle with high risk of you being viewed as the source of a new problem and subsequently let go or told to stop it. The only solution in those cases is to stop caring to that level (after all, it's not your company) or find a new job.