I strongly disagree with what you wrote. I am very critical when it comes to food, and I have been shopping at Trader Joe's for at least 20 years. I find their processed foods to be of very high quality. There is no account for taste, so you have to choose what you buy, just like in a restaurant. But by and large I find their foods tasty. Their meat is of really high quality, and while not all their produces are as good as places like Whole Foods and other high end grocery stores, their carrots (mixed colors) are great. Their lettuces are excellent. Compared to places like Safeway, their produces are much better.
Plus, if you try something and you don't like, bring back the receipt and tell them. They will refund you.
Also, they seem to have the happiest workers there, which make me think they treat their employees very well. I love shopping there.
I used to shop for groceries at many places, and I remembered I was always surprised by my Trader Joe's receipts: they always ended up being lower than I expected, by 15-20%.
Last week I was in the check out line when a Trader Joe's employee tapped me on my shoulder and asked me if he could trade my 4 year old worn out TJ insulated bag for a new one, a $19 value, at no cost to me. That I didn't expect.