Frozen veg often has more vitamins than fresh that has been kept for a week.
Yellow broccoli is fine to eat. It's just the flowers opening. Bendy carrots are also fine if they aren't mouldy and don't have soft black spots. Just put them in a bowl of water in the fridge and they will revive. That works for any wilted veg - lettuce, peppers, cucumber etc
It's best to save veg that lasts well for meals at the end of the week eg cauliflower, carrots, cabbage, unripe avocados. The same with fruit eg apples, pears, citrus, whole pineapple, green bananas, refridgerated grapes. Eat the salad and soft fruit first.
Mushrooms keep best in a paper bag. Soft fruit and things like tomatoes will last longer in stay fresh boxes eg Sistema
I also keep things with stems/roots in jars or bowls with a few cm of water, like flowers in a vase eg spring onions, asparagus, globe artichokes, whole lettuce, whole heads of broccoli. The spring onions actually keep growing!