Could you explain why it's not a real bonsai?
While you are not going to get anyone to agree on what the definition of Bonsai is (there are plenty of threads here where that topic has been beaten to death), I would point you to the Wikipedia definition of bonsai as a starting point:
Bonsai (Japanese: 盆栽, lit. 'tray planting') is a Japanese art form using cultivation techniques to produce in containers, small trees that mimic the shape and scale of full size trees.
In this context I would start by asking: Does your tree look like it mimics a full size tree?
Then suggest you ignore the answer, because unfortunately it is not that simple. You will find lots of examples of "Bonsai" that also violate that definition. And if you ask two people what Bonsai really is, you are likely to get three, or more, contradictory answers.
No disrespect to Source, who has been the source of lots of bonsai knowledge for me, these ginseng ficus are a common starring plant and mass produced, so are looked upon with disdain by many who practice "Bonsai". They are often referred to using the pejorative term Mallsai: "
a term used by bonsai enthusiasts to describe mass produced trees typically found in malls, chain stores and garden centers around the world."
It would be like showing a "Salisbury steak" to some butchers and being informed they did not consider that a "steak"
I would also mention that I suspect many BNutters got their start with similar material (My son's first Bonsai was a ficus very similar to yours). So take the "not a bonsai" comment as encouragement to continue learning about bonsai.