I've been eating frozen foods for 20 years, and I ain't dead.
You're doing fine. Many times the vegetables that are flash frozen at the farm's own plant retain more vitamins than the "fresh" ones that have been traveling for days on trucks. If I'm going to serve veggies cooked I prefer frozen in the microwaveable bag. I also buy chicken tenders, cod and salmon frozen, then take them straight from the freezer to the oven. Less time to grow bacteria that way.
We love salads and fruit though, so I spend plenty of time in produce buying apples, bananas, cantaloupe, lettuce peppers, zucchini, tomatoes, mushrooms, celery, cucumbers, peaches, plums, onions, potatoes, nuts, and avocados. (That was just last Friday) I spend a fortune on produce, if they're trying to make us eat healthy they're not doing a very good job of it at my Kroger, we get away much cheaper on the occasional "fun run" of junk food.
I only buy hamburger about once a month. Then I buy oatmilk, plant based butter and a bunch of Gardein products for my vegan son.
A few nights ago I made hamburger/macaroni for all of us. I boiled a pound of macaroni, then got out two skillets, fried a pound of hamburger in one, fried a chopped onion in each skillet, split a jar of spaghetti sauce between the two, added that fake Gardein hamburger to the other one, added fake cheese to one, real cheddar to the other, got out two casserole dishes and baked them both while boiling some corn on the cob.
What a mess! They sure were happy though.