Is it possible to be hired as a cabin crew in one of the largest airlines in the world without the discrimination?

Definitely; But chances would increase If that airline has a base of operation from your place, they could possibly hire you. It all depends on how you perform in their selection programs. A word of advice as I believe you are a fresher. Try to get inducted in any airline regardless of small or large, domestic or international and increase your experience. "Exprience is an ultimate key in aviation". Good luck!

Although Discrimination as a social evil can't be completely eliminated from society, you may still stand a chance to land your dream job. If you have "what it takes" to qualify to be a cabin crew member, it will be a matter of time for you to get the job thus believe in yourself, work deligently, make contacts with people in such profession & also try to be mentally, physically & geographically mobile to stand a chance to exploit opportunities