>>50461441You need to play the games.
Silver hates weakness. That's why he is so determined to become the strongest trainer. He views Team Rocket as weak because they group together to cause harm and attack vulnerable people. At first, Silver uses brute force instead of kindess and love towards his Pokémon, because he views love as a sign of weakness. Eventually, he changes because he realises his worldview is completely warped. He always calls you weak not because you are a bad trainer, but because you treat your Pokémon with love.
Play the games.
Read the dialogue.