I saw a workplace article that I think can apply to Dota as well. Here are excerpts:
1. Announce your own success constantly
“Have you noticed how the people who seem to toot their own horn have an image problem? And, it’s not a good look. They tend to reveal their insecurities: look at me, I’m awesome!”
2. Talk smack about others
“Eventually, your coworkers will start to realize your bad-mouthing is a sign that you can’t control what you say….
Badmouthing destroys credibility because coworkers will wonder what other negative remarks you are making — especially about them.”
3. Play fast and loose with the facts
“It’s easy to pump up our egos and pretend we know what we’re talking about.”
4. Berate people endlessly
“They respect you for how you say it as well. Add a dose of humility and civility, and you’re credibility will go sky high.”
Link to full article: https://www.entrepreneur.com/article/373714
Public Notice 