I'm technically a millenial if that matters, but I've been bringing my own bags to grocery stores for over a year now with no qualms whatsoever. I keep a bunch in my car at all times. I have one reusable cooler bag I always bring to places like
Walmart and Target and have gotten tons of compliments/"where did you get that's" on it. And sure, it's annoying if you forget one and have to make a stop, but it happens and you move on.
Good reusable bags are not expensive, last quite awhile, can even be super cute and are most importantly, reusable! Is it really that big of a deal if you're encouraged to use one? In the overall scheme of things, does using a reusable bag ruin your day? I'm truly sorry if it does.
This dilemma is just like the plastic straw issue. People argue that plastic straws and bags aren't important and we should be focusing more on bigger environmental issues. Yes, we absolutely should be concerned about other issues, but good lord, why can't people just be happy we're starting somewhere and it's a small step in the right direction?