No, not at all. However, this does not require you to ignore your concerns about mankind need to be thrown out.
Here’s the problem. Misanthropy comes form the Greek misos, “hate” and anthropos, “man”. Thus it means, literally, to hate mankind, although it is sometimes used to describe a much weaker sort of feeling, a sort of mistrust of man.
Catholics believe that all men are made in God’s image, and thus deserving of respect and a certain amount of dignity. “You shall love each other as I have loved you”, said Jesus, and He loved even those who committed grave sin (the adulteress, for instance) as long as they repented.
HOWEVER, you are entirely right to be disgusted at the way that many human beings behave towards each other. The Catholic response, however, is to admonish the sinner, remind them of the wrongness of their actions, and, if they repent, to lead them to forgiveness and a changed life.
Finally, I think (since I myself used to think much like you did back when I was an atheist/agnostic) that you might find this quote from Chesterton helpful, since it helped me:
When the world goes wrong, it proves rather
that the Church is right. The Church is justified, not because her
children do not sin, but because they do. - G.K. Chesterton, The Everlasting Man
