Contributing to open source projects is pretty much just altruism.
If we're talking about protection of people integrating open source code in their proprietary code we'll always have issues. It doesn't matter if we declare our projects under GPL, AGPL, LGPL, CC or whatever, unless they do shoddy work, we won't be able to know what code snippets, libraries or frameworks they're using when source code isn't disclosed.
People that want to be assholes will always be assholes. If you feel like giving back, contribute to an open source project. If you don't, don't. But making it about evil corporations is a bit meh. Even a company like Amazon is actively contributing to improving Java, offering the Amazon Corretto JDK for free. So the path forward may just be trying to be the change yourself, and making sure the company you're working for is also giving back somehow.
I study Software Design where I'm the "class representative", work 20h a week, I'm also planning my wedding and I have to manage a lot of family and friend stuff. There's a lot on my plate and feeling overwhelmed has become the norm for me.
What helps for me is:
That's the gist of what works for me. There are also some motivational techniques for "how to start doing". One of those is "eat the frog" where you pick the worst item from your to-do list and finish it, then the other tasks will be less daunting. Another one is starting with a super easy or small task to get you into a flow state of actually doing stuff. Both work for me in different situations and mindsets 😄
I hope that helps somehow.