Yeah I think that’s a whole separate post. Being a good design leader and helping to build an organisation that fundamentally cares about good design is really important (and really tricky). It takes time and you most likely need to be in a leadership position in the company to be able to affect that cultural change.
That said, as a member of a design team (who may not be in a leadership position), the best way to start people on that journey is to advocate for and care about good design yourself and find ways to demonstrate the value of design in what you deliver. Instilling that pride in others means you don’t have to be 'the guy banging on about good design’, which will only make your job much harder.
If you can get to a point where you can prove that projects which were considered and designed added more value, then people will get onboard.