Thinking you're right because of many years of experience.
This! Also, assuming you have more years of experience. So many people assume I've been doing this for a couple of years, when in reality, it's been 10+ years.
My new job involves dealing with a 30-year-old Oracle Team. They still code in obsolete ways, that even Oracle advise against. "But it works still!" ? angery
This! It's so frustrating especially when they are a little bit out of touch on how some things work, due to them taking more responsibility on a managerial role and so have less time to keep up to date with tech at the coding level. But they'll still want to walk over you and dismiss your opinion because you're more junior compared to them 🙄
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