The way you are saying, I assume you are not a capitalist.
If the bakeries overproduce, it is because they want to have a nice selection, and there’s no way to know precisely how much of each item to sell. That is a business decision, and I assume they know their business better than you or I, and will profit more this way. That is not bal tashchis, and it is unfair for you to want them to suffer a loss.
I know a few bakeries who donate leftover challahs, bread, and pastries to needy families before Shabbos every week. I’m also aware of takeout places which donate leftover food to bikur cholim rooms in hospitals. There are dedicated volunteers who spend hours on erev Shabbos picking up and delivering food.
Erev Pesach, obviously, no bikur cholim or other tzedakah organization will take chometz to distribute for Pesach.
I’m not sure what you want – they leave it out for whoever will use it before the zman, or for non Jewish needy people to take. You would prefer that they donate it to some organization, so you should advise the bakeries as to which, and they can decide if they think that’s a better idea.
Meanwhile, it looks as if you’re good at spending someone else’s money and time.