Such ethical standards can only be altered on a big scale through relentless struggles. Abolish competition and advertisement, and suddenly a lot of things will start to be ok in society. Yes a lot of people will loose their useless job, but that won't be a requirement to have a place to live anymore, and both individuals and society will be better off.
Competition doesn't mean "having ideas" or going separate ways. "Competition is a rivalry where two or more parties strive for a common goal which cannot be shared" (wikipedia).
For example, competition is when you keep millions of empty apartments to make sure everybody struggles and will pay more and do whatever you say to find a place to live. Competition is also when you teach children in schools that they should not copy because it's cheating.
Advertisement is also not "telling anybody". It's paying other people to tell in your place about stuff they wouldn't want to talk about otherwise.
What are the limits to this abolition of competition? How could you possibly eliminate all zero sum games? Watching toddlers ‘compete’ makes me believe competition is very human and a natural extension of desire.
1. Create fear of the thing that would otherwise be desired. Associate it with badness. This is a slow but relentless form of operant conditioning, which can be done entirely using words and stories.
2. Create substitute and symbolic objects of desire, in order to redirect effort. The purest of these is money.
That's not how ideas work, except in a capitalist system. New ideas about how to better run the world are not allowed because they compete with private interest of the ruling class. The same is true in pretend-communist States like the USSR, which are just State-capitalist systems, not actual communism (where communism is according to Marx abolition of class, property and privilege... none of which were abolished in Leninist States).
