Your portfolio is very nice and your models seem to be of high quality, so I am sure that´s not the issue.
Many have complained about a downward turn in sales, and I think it might be a combination of CGT´s algorithm and search function being messed up.
(As a frequent customer, I find it hard to find what I am looking for as many relevant search results simply don´t show up.)
Add to those factors, the fact that AI has exploded.
Like a Blender Youtuber explained (and I am paraphrasing): "I could do most of this with AI, but I like doing it myself in 3d as it´s more satisfying".
If you work professionally with 3d models, you probably can´t afford to care about "doing it yourself", you care about getting it done and making money.
If you´re using 3d for concept art, illustrations or basic 3d animations, it´s faster and cheaper to use AI for a lot of it. Not all, but a lot of it.
It might be different for hobbyists, but then the question is: what kind of budget do you have to spend on 3d models, and how important is it to "do it yourself"?
On top of that, we have a financial situation in most parts of the World that also puts a damper on people´s willingness - and ability - to spend money on models.
Just my 2 cents.
