I believe there is a lot to be said about trying different types of AI's including different manufacturers who may also use different fillers.
But something to keep in mind is the drug is meant to suppress estrogen production. If you research how estrogen works in your body, you'll get a better idea of what to expect simply because the drug is working. Weight gain, for one, is possible because of the lowered estrogen level, not the drug per say. There's also elevated lipid levels, moodiness, insomnia, and more. It's the loss of the estrogen that may be to blame. As to joint pain, I was almost literally crippled by knee pain, but adding collagen supplements had huge results. I also found that when I tried a lower dosage that I had serious jaw pain (from Prolia?) that improved with a higher dosage. Everyone is different and will react differently so you just keep experimenting. This forum is such a great place to get those ideas.