Plea for gardening advice


I planted this baby carrot from seed in late spring. It somehow survived the Evil Squirrel Excavations of May and the Great Groundhog Scourges of July and August. I carefully watered and weeded around it, showered it in encouragement and nurturing thoughts. I was encouraged by the healthy-looking leaves above ground and decided to harvest it before the frost.
I know it's supposed to be a baby carrot, but this looks more like an embryo carrot. I SO do not have a green thumb.
No wonder the groundhogs and squirrels left it alone; it wasn't worth their time! They were probably laughing their guts out.
I've never had a particularly green thumb. I also planted a tomato plant from seed. Like its baby carrot counterpart, my tomato plant seemed to flourish. Yet I've only managed to harvest four (4) baby tomatoes so far, while my neighbour's baby tomatoes are practically jumping off the vines because they're so heavily laden with fruit.
I'm not quite sure what I'm doing wrong. One possible problem is that I'm using planters. Another theory is that the plants know that they're just going to get dug up and eaten by the neighbourhood groundhog, so what's the point anyway? But that doesn't explain why my neighbour's vegetables are doing so well and mine aren't.
Gardening advice welcome!