I am a male full-stack developer from one of the Asian countries, and I work in a tech company after graduating from a private but well-known university here. At my workplace, I had a colleague, who was a senior developer, let’s call him Saim, who always said strange and inappropriate things. At first, I thought he was just old-fashioned, but over time, it became very clear he was openly sexist. In the beginning, it was small things. He would give more attention to male coworkers and dismiss female coworkers’ ideas in meetings as “lucky guesses.” But as time went on, his comments became worse. One time, he said, “Women just aren’t as naturally good at logic-based work.” Another time when a female coworker raised a concern, he laughed and said, “If women spent less time worrying about their looks and more time working, maybe they’d get promotions.” Whenever there was a difficult project, he would smirk and say, “This might be a little too hard for the girls, but don’t worry, just smile and the guys will help you out.” The worst incident happened on a hot summer day. A female coworker wore a sleeveless top, which was normal office clothing. Saim stopped in the middle of the discussion and said, “Wow, dressing like that to get extra credit from HR? Bold strategy.” Some people laughed awkwardly, but the coworker looked humiliated. She stayed quiet for the rest of the day. That was when I decided I had to act. I started recording his comments in meetings and casual office interactions. Over the next few weeks, I gathered several instances of him making sexist remarks. The worst one was when he joked that women should stick to “easier” departments because tech was “too stressful for them.” That made me angry because I saw how hard many of my female coworkers worked, and he was basically saying they didn’t belong. I compiled everything and sent it anonymously to HR. They took it seriously, launched an investigation, and asked our team about his behavior. And we all told them the truth, and within a month, Saim was fired. When the news spread, my best friend at work was cursing the person who reported him because Saim was his mentor, and he was learning from Saim. I told him it was me, thinking he might understand or even support me. Instead, he went around telling everyone else. Soon, many of my male coworkers started coming after me. They said I had destroyed a man’s career over a few “jokes” and that I should have just ignored him. Some even sent me angry messages online. But the women in the office reacted differently. Many of them quietly thanked me. They told me they had felt uncomfortable around him but never dared to report it. **AITA for ruining his life and getting him fired?**