Your post is very interesting. I have attended a Southern Baptist church for many years until about 5-6 years ago when I moved to a PCA church for personal needs. But I have warm feelings toward the Southern Baptists.
The SBC has troubles just about the same as every other group-sound doctrine. The problem with the SBC is that they don't want to admit it. There have been tensions between the Reformed and Aminians members for years. Rather than trying to solve their doctrinal dispute, they just want everyone to pretend that the most important issue is evangelism and ignore sound doctrine. I personnally believe they have this backwards. They need to return to the Baptist Confession of Faith of 1689. They may be forced to break into a smaller group like the Presbyterians or Lutherans, but in the end they'll be better off for it. Apparently they just want to look the other way. They need to return to their confession.
My experience is very similar to yours. I was raised SBC(most of my relatives still are) and I still retain great affection for it. However, I discovered the Reformation and Westminster Confession of Faith many years ago via a Ligonier Conference. I’m now in the PCA. I think since the SBC is either the largest or one of the largest Evangelical Protestant denominations, there is a tendency to “not rock the boat” to keep their numbers big. If they had returned to the Baptist Confession of Faith of 1689, I might’ve stayed. Many would be surprised to learn how similar it is to the Westminster Confession of Faith.