if you didnt notice any benefits from it then I am guessing that you might have low androgens. Assuming that tribulus only upregulates androgen receptors then this means that you now have a bunch of androgen receptors but maybe not enough androgens for them. To confirm or deny this theory you need to take something like creatine for a few days and see if you notice anything from it. If you do then that means that my theory is correct
additionally it may also be possible that your androgen receptors are already highly upregulated and as a result you dont notice anything significant anymore. This is a distinct possibility as well
You can look on the internet for studies/articles about tribulus upregulating androgen receptors in the brain. The reason that I believe that tribulus upregulates androgen receptors (as opposed to androgens themselves) is through lots of trial and error. I have tested these kinds of things out a lot and my experiments suggest that tribulus only upregulates androgen receptors and not androgens. This is why so many people claim that blood tests dont show tribulus increasing androgens, yet people are still feeling benefits from the tribulus. Why? Its because people are looking at the wrong area, they should be looking at androgen receptor density instead of androgen levels themselves