What veg bashing do you mean? If you're under the impression that strength and LBM increases would be the exact same w/ a vegan diet compared to an omnivorous diet then you are sorely mistaken. Also, soy products causing estrogen-related side effects is 100% bro-science and I have never said anything suggesting it would be "bad".
Also, you're not really in any position to say your results weren't hindered, you know? As an previously untrained 16 year old quite literally swimming in the sea of testosterone- you are the most sensitive you'll ever be to amino acids, so I wouldn't expect there to be a huge difference in 6 months worth of training. I would expect you to do slightly better over time, which will continue to be magnified over time.
So, are you getting your soy-titties in a twist? Seems to me like you're looking for a conflict where there isn't one. It's pretty clear cut to me, however, that if you want to be the strongest version of yourself- you're not going to accomplish it being a vegan.