Linux is even worse. What do you know of the people and their backers that develped it?
Someone has definitely brainwashed you if you think Linux is worse! Linux's code has been worked on by even more people than Firefox. If you want to see the code, you can view it yourself. And if you know anything about coding, you will immediately be set at ease that everything in it is on the up-and-up. Open Source community, complete transparency; making a secure OS for ourselves! Code is free to look at or to change at will.