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'complaining about your paltry problems' is not a sentence because it lacks a subject:
You are complaining about your paltry problems again.
Greg is complaining about your paltry problems.
To be paltry is to be insignificant. An example sentence would be: What is paltry to one person might be very important to another person.
what a garbage man earns is a paltry compared with what a surgeon earns.
one cent compared with a billion dollar is like paltry money.
Mary is so materialist, for her, feelings are paltry.
abundant