Would it be wrong if I accept a job which many of my colleagues have been trying to get
Why would you accept the job?
Let me tell you, I was really just the most fortunate
If you don't feel you are qualified for the job you are given, then perhaps you should consider giving it to one of your more qualified colleagues instead.
What, It's my decision to choose which job offers I should accept.
You're right about it being your choice. However if you think you had an unfair advantage, it would have been considerate to step aside so someone deserving of the position could have taken it.