Hi Amanda -- Welcome to ATP !
I'm wondering if your plants were "hardened off" before transplanting -- ? If they had just come from a greenhouse and then were planted in the open, the sun and wind can really set them back. I grow most of my own plants from seed but they have a very sheltered life in my greenhouse and are pretty tender; I like to cover everything after planting out with "floating row cover" (like Reemay, Agribon, etc), which protects them while they're getting acclimated to being outdoors (as well as preventing my cats from rearranging them
)
Also, please don't be too discouraged if your garden isn't everything you were hoping for this year... it will be better every year as you gain more knowledge and learn what grows best in your area, when to plant, what problems to watch for, etc etc. Read about gardening, talk to gardeners in your area, keep asking and learning here on ATP -- and don't believe everything you see in Better Homes & Gardens !
I'm pretty sure no gardener anywhere ever said "my garden is perfect this year... there is absolutely no room for improvement!"
Happy gardening!