It doesn't get much more Sandbox than EVE. It's a perfect example of a sandbox game. I also dared you to give a better example of a sandbox game but you simply didn't.
It doesn't matter if you find EVE to be a horrible game or not. EVE is what it is. Every game is what it is. It's not up to you to judge for everyone how good or bad it is. Don't you understand that?
It's not my job to find a better example for you. If you want to stick with EVE as your example of what we should think of when we think 'sandbox game', then okay...
By all means, go with that, I'm sure EVE's sterling reputation won't be a detriment or anything.