sounds like desi tute(tution)....so a guy who is attending tution in desi langaues shows he is very poor.
Dave's attitude (homophone of destitute) looks like a poor's.
Destitute sounds like 'this institute'; Imagine someone advising you "It's not worth studying in this institute, as it's difficult to get a job after studying from there and hence will destitute you (make you poor)."
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