My wife and I stopped attending meetings in 1988 and DA'd in 1989. We were doing our research in the interval between those dates. There was no internet, no Lloyd Evans. I spent hours in the library, my wife was going through bookstores. We joined a support group. We spent a lot of time with Crisis of Conscience but there was a lot of other information out there as well.
Looking back, I can see that the Watchtower's own words; the falsehoods, the hypocrisy, false prophecy etc condemned them. Our research was a matter of confirming what we knew to be true. It is true: by the time you're looking at apostate Youtubes you're standing in front of the exit door.