Working in a big company allows you to disconnect a bit, focus on getting done what you need to accomplish that day, and then going on about the rest of your life. And then eventually you can just stop altogether. It seems just fine so long as you don’t get caught up in the internal rat race, and don’t get too wrapped up in the ideas they try to sell you about being part of a community and all that stuff. Just do your piece, every day.
Also, it's darkly ironic that one of the best-case scenarios after leaving is that your new venture gets picked up by... a large company.