I just want to say goodbye to MS

I may be in way over my head but i am persistent enough to stick with this until I figure it out. What my goal is, is to never have to use a Microsoft product again unless I choose to. I am sick of them vandalizing and altering my property with a deliberate attempt to hide it from me and , of course, do not feel the need for my consent. I know I am no computer engineer and have no intentions of ever being one. I want an enterprise system simply for the fact I will have a fighting chance of actually owning and have control of the OS. I am not a criminal nor am i attempting to hide anything. I hope you will just humor me along and give me guidance on how to do this.