The Hereafter, the Hazla'i, leads to wonder about the Torah from heaven

Hello Rabbi!
 
I have read the fifth notebook in the first commandment, From Deism to Theism, several times. Let us assume that there is indeed a Creator who is interested in His creatures, with His purpose being man and to whom He wants to explain the purpose of the universe. There are two possibilities – either He has already been revealed, or it has not happened yet, we do not know. The rabbi wrote in his book a number of data that strengthen the possibility that the Torah of Israel is indeed the Torah of truth. However, even if we bring possible support (such as the argument of the witness, the uniqueness of theology, the uniqueness of the people of Israel), this is still not sufficient. We must examine whether the Torah in question meets the criterion of being written by the Almighty Creator. When we approach this issue, we encounter a rather problematic contradiction. The Torah promises in many places a reward for keeping the commandments, and in all of them it is about material reward. Your material rains in their season, so that your days on earth may be prolonged, and so on and so forth. It turns out that the Torah, that book of the Almighty Creator, who did incredibly sophisticated things, promises us a material reward for keeping the commandments. In practice, this is not the case. 'Others' have already seen this and have been amazed, and even today – it is clear that the economic situation in heretical Tel Aviv is much higher than that of believing Bnei Brak. In short – the criterion by which the Torah lets us examine it, whether it is indeed the words of the living God, does not stand the test of reality.
 
Following this, the sages came and explained that it is about the next world, and that reward and punishment are not in this world at all. Today, after we learn about the Zoroastrian religion that dominated Persia, we know that it is no coincidence that throughout the Bible there is no hint of this, but in the sages this is a simple concept (all Israel has a part in the next world). The Persians are the ones who brought the idea of ​​the next world, such as the resurrection of the dead and the Messiah, and so on and so forth. And see the book "Good, Evil and the World: A Journey to Pre-Islamic Iran". Therefore, the excuse of 'the reward is in the next world' does not hold, because that is not what the Torah intended, or at least it can be said that it is the most plausible.
 
It follows from this that we can assume with some certainty that the Torah is not from heaven, because it makes promises and does not fulfill them, and that is not what I would expect from an omnipotent Creator, who knows how to construct a singular point that will expand precisely to the people reading this text now, and who can cause the sea to split in two.
 
By the way, this recurring motif also appears in the Sota parsha. The Torah offers us a way to test her, to give the Sota a drink of the bitter, cursed water, and if she deviated – she will die. I remember how when I studied Tractate Sota, I was shocked by how the Sages simply uprooted the entire miracle. 'The right hangs on her,' and all sorts of other lame excuses. According to this, it is possible to understand why. The Sages, during the second verse, are shocked at how this thing doesn't work. Therefore, they make very lame excuses to explain it.
 
These are the only two places I can think of where God supposedly invites us to check whether this is indeed the book He wrote, in both cases it doesn't work, and in both cases the Sages completely distort every way to check this. From this we can reach the conclusion that even if God does indeed want to reveal Himself, He has not yet done so, or at least He has not done so in Judaism, because we see that the most basic thing I would expect from a book by the Almighty Creator of the universe – to keep His promises – simply does not exist here.
 
I would love to know what you think, and in general whether you believe in the afterlife and why.
 
Thanks in advance!