Do you think it’s rude when someone doesn’t say thank you when you hold the door for them?

So this morning I held the doors for one of the staff at my college since she had her hands full. She didn’t say a word. She just walked past and didn’t say a word. That’s why I don’t like doing things for people anymore. No manners. To think that she’s older, she‘s be wiser.
Maybe I shouldn’t say thank you anymore. You’re supposed to say thank you when people do things for you. That’s the rules and proper manners.

Do you think it’s rude when someone doesn’t say thank you when you hold the door for them?
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