No! I beg to disaggree. Quitting is not only for losers. Quitting doesn't mean you're weak. For me, it depends on how you see the situation itself.
Let me change the word QUIT to CHANGE OF PLAN. When the first plan doesn't work , why would you suffer in staying in that situation whe you've an alternative. Maybe , your mind saying "well, this is my life and I should get used to it." You're wrong , for me in that scenario you're the loser. Quitting is the best option when you have enough. Don't be afraid of changes. Because, that's how we will grow.
For you, is quitting is for losers?