>>94270>>94520No. Learn to derivations. Philanthropist comes from 'philanthropy' in the 1720s, which came into English from Greek through Late Latin in the form of 'philanthropia' in the 1600s. The "ee" sound at the end of the word was already there from the original loan.
Misanthrope comes directly from the Greek form 'misanthropos' circa the 1560s, with the alternate form misanthropist surfacing in the 1650s, likely via analogy with other words containing the -ist ending, rather than via knowledge of the word's actual history, which I just outlined above.
Now stop being ignorant on the Ignernet.