How does it come that if you are doing something for a group out of
stupidity kindness like buying water, fixing the IT, whatever, you suddenly become responsible for it in the eyes of everybody?
Why does nobody else takes the initiative any longer? Why is everybody waiting for you to do it? And why are people annoyed if you refuse or just see that you get your stuff but not theirs?
To say “you are good at this”, or “but you have done it before, why not now”, is not encouraging at all. On the contrary, it gives the impression that you are punished for taking care. Not exactly the incentive to give…