Is there an expression that you could use when you feel really disappointed because no one appreciates your favor and kindness, and they usually upset or hurt you instead. An expression that suggests this usually happens to you (Not 'bite the hand that feeds you')
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2It sounds like you're feeling unappreciated. – Kevin Workman Jan 29 '16 at 17:21
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You suffer from ingratitude. – Graffito Jan 29 '16 at 20:35
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You suffer from teenage daughters. – Jim Jan 29 '16 at 21:45
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Speaking figuratively, you might say that you feel as if you're being "treated like a stepping stone." – Sven Yargs Jan 29 '16 at 21:53
It sounds like you're feeling unappreciated:
not fully understood, recognized, or valued.
"she had been brought up in a family where she felt unappreciated and undervalued"
synonyms: unacknowledged, unthanked, uncredited, unrecognized, taken for granted, overlooked; undervalued, underpaid
You might say you're...
crestfallen (Merriam-Webster)
adjective
dejected; dispirited; discouraged.
Note that this usage often (but not always) has connotations of shame.
You could say, you're too kind/nice/helpful for your own good.
Are you agreeable, accommodating, and saintly to a fault? Being too nice to your own good can take a toll on you. The key: knowing when to curtail kindness. [Psychology Today](https://www.psychologytoday.com/collections/201203/too-nice-your-own-good