If one delivery truck is making 100+ deliveries a day, it should be partly or fully eliminating dozens of vehicle trips. Even if that truck pollutes more than the typical car, I'm sure the decrease in vehicle miles traveled more than compensates for it.

Is there a place you could live that has half-decent biking infrastructure and groceries within a few miles? An electric cargo bike or even mobility scooter could handle those trips. While a good one may cost a few grand, that's still cheaper than operating a car for a few months.