Another reason to use Logitech mice: ease of repair. Apart from skates covering the screws on the underside, Logitech does not use glue to keep it’s mice together. And due to their popularity, replacement parts (including the battery btw) are widely available even for older models.
No. He is bad and he should feel bad. He was sad because his evil plans didn’t work out the way he had hoped. He is alone because he abuses the people around him because he considers himself a superior being for whom others are just play things.
His backstory of abuse goes a way to explain why he is the way he is, but it does not excuse it.