The story has potential but the production seems to be lacking in budget and time. Also, they need to get an experienced English translator for their embedded translation or just include one and leave it to their partner streaming sites to do the English translation for them.
I hope the sequel, if there ever will be one, will have the budget and time to allow the writer and director to tell the story. A good story shouldn't be wasted like this. Make it count.
Last but not the least, the robots does not have to be "stiff". What they lack are emotions not oil. They came from a very advance universe. The virus may have had removed their emotions but it did not made their motor movements like a robot prototype of the 1900s. Make them relax. I mean, look at that female robot host to the virus, not once did she act stiff. Why are the other robots stiff? They don't need to be. Even the fighting scenes of the robots, it was like watching someone do the robot dance.
I hope this improves in the sequel.