Do you have the Flash Food app at all? I know that the area Giant stores have bought into it. It's basically an app that allows grocery stores to put stuff that's about to go bad. It's been a godsend for meats and breads (which can be frozen). For veggies, I get a farm share (major shoutout to Highland Orchards for being the most affordable one around) - $20 for produce that lasts me (a single apartment dweller) close to two weeks.

If finding surprises in your food and hunting for near-expired grocery items is not your thing (I can see why - it's not a sustainable plan), I will agree with the others on Aldi/TJoe's (for basics, frozen foods, and snacks); Whole Foods (believe it or not) for generic-brand items, and same with Target for one or two generic items; and the Asian grocery stores in the city (either on Spring Garden, Washington, or Oregon. I believe the ones on 3rd and Oregon and 4th and Spring Garden have the same owners) have been wildly good for produce and meats (imo, the 6th and Washington one is best for meats). AND if you live in South Philly, the Hispanic grocery stores have also been wonderful for produce (there's one on 7th and Tasker, and I believe 7th and Morrisish? There's also one on like 10th and Snyder that is wonderful, and I miss it so much)

I only touch Acme, if I happen to be in the area and I just need a real-quick 1 or 2 items things. My neighbor and I are regulars at the South Street one, and the manager there is very nice - but goddamn it's expensive.

It's rough out there. Good luck!