Is it true that Jesus's birthday wasn't decided until 349 AD?

These facts so bothers me. I feel very scared to believe all the bible stuff. Exodus 35:2 says For six days, work is to be done, but the seventh day shall be your holy day, a Sabbath of rest to the LORD. Whoever does any work on it must be put to death. It all looks very scary. How can christianity be a peaceful religion. The whole frame of the Bible is that it starts with Adam and Eve and a talking snake. It really bothers me especially the story of Noah building a boat and making 1000000000000000000000000000000000000000… animal types fornicate on a boat, Jonah living in a whale, the virgin birth, turning water into wine, raising people from the dead, walking on water and so on. All these myths are plagiarised as they were previously discussed 2000 years ago before christ in Indian, Greek, Egyptian, Persian, Roman religious traditions. The most bothersome story is that God had a son. What is this bonanza. He sent his son on a suicide mission. But don't worry they can't kill you cause you are really me. But it is gonna hurt for a few days and I am not gonna lie about that son. I mean me. I mean me. I am you. It is always the case that if God wants to communicate something to the world, he could just talk as he is all powerful. It always seems that he picks out a prophet and tells them that you are the prophet and you go tell them the truth to the world. We just have to take everything on faith. If the prophet is a lier then we are all fuc*ed. When you add all the super duper angels, it doesn't really look like it is a monotheistic religion. Many also believe in mini-gods. It is very offensive towards homosexual people. Homosexuality is something that naturally occurs in nature. The ten commandments also doesn't seem to be a wise list as it does not include child abuse, rape, torture and so on. If we are making a list today, we would probably include all these things. It also seems like the Bible was written by real men and when I say men I mean people with penises. They always characterise woman as inferior to men. Doesn't it seem that the Bible was written and edited by men and all the nonsense in it were just edited so badly