Is "Be the part of the change you want to see in the world!" bullshit?

[FlatAssembler]

If you say "I'll stop being an asshole as soon as everyone else stops being an asshole" it just means that you're still an asshole.

But the problem is that it is better to be "an asshole" than to do ineffective or counter-productive things in an attempt to address the global problems.
People who simply don't care about global problems are better for the world than people who are boycotting sweatshops (a very counter-productive thing).
And who knows whether insisting on me being a vegetarian in my father's house (after my mother ended up in a prison) was morally objectionable. It definitely caused him to worry about my health (unjustifiably, but that's a predictable consequence of my actions) and to spend significantly more time cooking. Insisting on me not eating eggs would probably cause way less trouble and would certainly be way more effective in reducing my impact on superbacteria.

Another slogan is "there is no ethical consumption under capitalism.

I must admit I don't understand what that means.

At the very least, to be aware of the fact that we live by exploiting others.

But isn't the same true under any economic system, and not just capitalism? In fact, it's even more true under socialism, since socialism relies on coercion to work, while capitalism doesn't.