Why is it that whenever I say something, I just have to regret it later and feel that I'm being judged and shamed by what I said? Is this what I have become after living 15 years in this place, in this era where people do judge?

I can't help it. People, including myself, always say, 'Don't judge.'
But I can't help but judge. The first thing when I see others is to judge, but I do try and push it down so it doesn't affect my view of the person as I get to know them better.