Why do they feel the need to do this?

I know I have mentioned this alot in other threads but why is Sony even doing this? 2 of the movies were originally well done yet they edit things out that nade both movies feel all likr a jumbled mess and replace them with scenes that don't play out well and just make the movie even worse like the web shooter scenes of the second movie and doctor Kafka even both electro freak out scenes. I really question, if they really want to keep the rights then why keep screwing themselves over?