Afraid not. The historical record is quite thin, and it's not clear that you understand exactly how thin it is. Re-read some of my recent posts.
Copies aren't always precise. It is well known that copying methods can introduce errors, redactions and interpolations. We have lots of evidence of that with Medieval manuscripts, produced by hand, before the invention of movable type.
What we do know is that the closeness of many of the texts makes it readily apparent that people were copying from one another. The exact order is not clear -- e.g. some hold that Matthew and Luke were copying Mark; that Matthew, Mark and Thomas may have copied from another early source, now lost; that John was likely not copying Mark, Matthew, Luke or Thomas; some assert that Matthew came first, and Mark saw unpublished versions of Luke's gospel.
It's not clear if Q is needed. What is fairly evident is that Matthew and Luke share a source in addition to Mark, and that attempts to resolve the Synoptic Problem without Q are equally problematic as the Two Source Theory. (E.g. why was Mark's gospel shorter than that of his source? What is the source of the Double Tradition?)
Uh... No, it really isn't. Its existence is widely accepted. E.g. from the Jesus Seminar:
As we enter a new century, some form of the Two Source hypothesis continues to be preferred by an overwhelming majority of critically trained New Testament scholars as the theory that is best able to resolve the synoptic problem. Although the Jesus Seminar did not formally endorse any single theory of the relationship between Matthew, Mark & Luke, the fact that the Two Source hypothesis was presupposed by most Fellows in their own analysis of gospel texts inevitably made it the common frame of reference for most of the Seminar's debate about the sayings & deeds of Jesus.
This does not mean every scholar accepts it, or that every scholar must accept it, or that it is wholly uncontroversial. However, it is certainly not "highly discredited" because one scholar (Goodacre) wrote a few books on it over 10 years ago.
lol
Yeah, not so much. These types of textual discussions neither prove nor disprove a supernatural belief. It's more like figuring out a puzzle, where half the pieces are missing.