I understand your frustration. It can be hurtful to be accused of copying someone else's work, especially when you know that you have put your own unique stamp on it.
It sounds like you have a strong foundation in art and animation, and you are clearly passionate about your work. I think it's important to remember that art is subjective, and what one person sees as a rip-off, another person might see as an homage or a tribute.
If you are concerned about being accused of copying someone else's work, there are a few things you can do. First, you can make sure to cite your influences. This shows that you are aware of the work of other artists, and that you are not trying to pass off their work as your own.
Second, you can develop your own unique style. This might mean experimenting with different techniques, or finding a particular subject matter that you are passionate about. The more you develop your own style, the less likely you are to be accused of copying someone else.
Finally, it's important to remember that even the most successful artists have been accused of plagiarism. If someone accuses you of copying their work, don't take it personally. Just calmly explain your process, and be confident in your own work.
I'm sure that your art is beautiful and original, and I wish you all the best in your artistic journey.