This is an argument from ignorance. Your lack of knowledge on the topic does not justify claiming the theory is false. Here is some evidence for the Big Bang:
1. The universe is continually expanding. Here is an explanation of it from the National Center for Supercomputing Applications:
http://archive.ncsa.illinois.edu/Cyb...ExpandUni.html
2. There is a cosmic microwave background that astrophysicists knew should exist if such a massive explosion had taken place, so they hypothesized exactly what it would be like, looked for it, and found it. Here's an explanation of it from the European Space Agency.
http://sci.esa.int/planck/51551-simp...ing-to-planck/
3. Because it takes so long for light from other galaxies to reach us, we can see "snapshots" of different galaxies that formed at different times. Hubble realized that there is a clear pattern of how galaxies formed and behaved differently over time, which is consistent with what should happen after an event like the Big Bang. This has been exhaustively tested through computer simulations, and has been irrefutably proven. To deny this piece of evidence in particular is to deny reality. Here is an explanation of this from Laura Sales at Harvard.
https://www.cfa.harvard.edu/~lsales/...orphology.html
4. The chemical makeup of the universe is consistent with a universe in which an event like the Big Bang took place. Here is an explanation from astrophysicists at UCLA:
http://www.astro.ucla.edu/%7Ewright/BBNS.html
These are not just ideas that scientists "like" so they stick to them; they are exhaustively tested, and if they failed, they would be thrown out and the search for evidence would continue. Accepting the prevailing explanation for the formation of the universe based on astrophysics does not require faith like believing the creation story of the bible. It's not even in the same ballpark.
What evidence do you think exists for a young Earth?