Besides this, Satoshi seems to have had quite a few reasons to develop
Bitcoin such as fleeing from banks, creating a trustless system, etc.
OK. So my reason is to protect your life savings from this ponzi scheme called bitcoin

I want to prove that decentralized trustless system can not exists in long term.
It either transforms to centralized system or loses its security.
May be you are successful for a short period of time to disrupt the network. But, there are too many stakeholders in bitcoin who are more able than you to keep the network safe. In the long run you'll lament that you have wasted your time to do some unselfish destructive work, while you could do some selfish constructive work. Good luck with your endeavour.