Since you say that you were always taught to question and debate, I hope you won’t mind if I do so too. After all, I was brought up with that same method. You have given 3 different reasonings above for your decision:
1) The world is imperfect
2) You don’t seem to belong in a frum setting
3) Torah doesn’t hold water in the face of scientific explanations
Then at the end, you say that you will live instead according to rationalism. That may have been a pervasive and intriguing way of thinking in the Renaissance era (Spinoza, Descartes, Kant, etc), but modern thinking has shown that human beings are not rational beings at all, but rather are rationalizing beings.
Any one of the three reasons you have given in your above posts can be countered by alternative logic, assuming the opponent in the debate is competent. You are merely rationalizing with this, not truly stating your reasons.
The subconscious of the mind is far more powerful than the rational portion, as psychologists have proven as early as the end of the 19th century. Rational thought without empirical evidence is next to worthless. Take physics as an example: Every theory postulated is a result of reasoning coupled with observation. Supposing we develop new measuring tools and an observation changes. As soon as that happens, physics changes. The previous way of thinking becomes laughable, no matter how rational it seemed before the tools were developed. It has already happened countless times, and it will happen countless more times in the future.
It is the same thing with mankind’s quest for truth. We lack tools to make the necessary observations. As a result, we are compelled to answer our own questions without observations; some attempt to do this with rational thought. The Jewish people believe that we do not need tools, because the Torah tells us as much as we need to know. That means that we do not have all the answers, only what we have been given. But no one without the Torah has all the answers, either. Certainly not the rationalists.
I can only imagine what it was that shook you enough to cause your way of thinking to change. All I can do is invite you to investigate the science from more than one perspective. The religion of science is a very weak one. We have a lot to be grateful to science for – a long list actually – but giving us truths about the world we live in is not amongst that list.