T.M.
Try to have him bond with just one person at the center. That way he feels safe. My son would cry when I left him at day care but now if he sees this one worker that he's close to, he lets her hold him and he feels better.
But I feel for him, he seems to really hate it for some reason. Is it scary? Did something happen? Personally if it is emotionally upsetting him it's not worth putting him through this. He's even throwing up he's so upset.