Whats on my PC is the bottleneck thats causing animation to play so slowly?

[YAFU (English is not my native language)]

Hello.
You follow the steps that have already been recommended to you to optimize the scene. Still, Blender performance for viewport animation is not good at all, there is still a lot to improve.
Next time maybe you should better use low polygon quad meshes to take advantage of OpenSubdiv hardware acceleration which is still in development (Subdivision modifier needs to be to the last of the stack):

Blender 3.0 OpenSubdiv development

Hi all, I have been working on some improvements to the Blender OpenSubdiv implementation, and I am sharing some builds for anyone who would like to try it out, test it, and make sure it’s all working good. Please note that the work is not finished yet. There are 3 main features: GPU acceleration This only happens if the modifier is the last in the stack. Although performance is improved, there is still one expensive operation which is done on the CPU, work is being done to port it to the GP…