Dissatisfied with the arguments of the WT ? Yes, sometimes I was , but it was not the evolution v creation. I recall conducting a group study when the book was first studied in the 80's. We all thought it was great and felt so enthused .
The arguments that seemed weak to me were the ones that related to chronology ( a day for a year and all that) , the application of 2 Timothy 3 to the days we live in, and Matt 24 as well. When they changed the understanding of the "generation" I really could see that they were changing it to fit a need, not a new "flash of light"..
I still remained faithful until near the end of the nineties, though. I am slow to react to things.......