If you think the Old Testament is so shameful and idiotic, why don't you confront and complain to your Jewish neighbors and colleagues about it? Jews are the ones who wrote it.We often comment on the same stories in the OT because the true believers keep harping on the inerrant nature of their holy book. The childish mentality and blatant discrepancies in Genesis make it such low hanging fruit. Not to mention the virgin birth with the two entirely different stories or the equally impossible and differing resurrection myths. You can also toss in the absurd notion of the Trinity as an afterthought.
I don't think the Hebrew Bible is shameful. It's one of western civilization's greatest works of literature and a repository of classical wisdom and social justice.
The wisdom literature, the ethical teachings of the Hebrew prophets, the moral laws of Torah are nice enough.
But I've never been to any Christian church where the Deuteronomistic history, or the Mosaic holiness codes, the civil, ritual, or dietary laws of the Torah play any significant role in Christian practice.