It's not that science and scientists set out to prove god doesn't exists. It's that the word of god as written down by men is contradicted directly and often by proven fact, and that belief in God is associated with a strong ignorance of reality.
People didn't live to 800. Goat blood doesn't protect you from plagues. The earth is not just 5 millennia old. Humans have not existed since the dawn of time.
I remember someone asking what are good documentaries on evolution that doesn't say "this is why religion is BS". I cannot recall a time having watched a documentary on evolution that blatantly says that. Religion on the other hand...
Anyone with two thinking brain cells would already put two and two together and see the contradiction. When I first learned about evolution in school, I thought to myself that it contradicts what the Bible said, and my teacher and the book never even said anything explicitly. However, I somehow rationalised that god must have created beings first and evolution took course after. It is in my later formative years, through education and more reading, which made up my mind that religion overall is nonsense and the denial of reality.