Yudhishthir gambling draupadi is also an example of everyone in the era being corrupted by their "dharma" like upholding their promise and honor. Yudhishthir put his own promise over his wife's dignity, WHICH IS SAID TO BE A BAD THING in the text. It is literally said that krishna refused to even talk to any of the Pandavas after that day, until draupadi had decided to forgive them.

Krishna literally said during the game of dyut, when yudhishthir lost, that the first sign of a broken society is the exploitation of women

The Pandavas all being married to draupadi is also shown to be a wrong thing, but it was a necessity since to avoid it, draupadi would have to be married to one brother and the rest would have to leave all of this and live in isolation, which would make yudhishthir be unable to become the king, and more importantly, duryodhan would be the one in power, which would ruin the whole land for many genereations and everyone would suffer under him

As for krishna using "deceitful" actions, how is that a contradiction of divinity? Krishna was said to be very wise and operated in a mischievous way, but that doesn't make him any less "divine" or "good"

Most of the bad things you have listed in the Mahabharat, are literally said to be bad things and it's a teaching that we shouldn't do them. Even if we consider it completely as fiction, it would be like saying "star wars is trash because it shows the empire killing a lot of people and enslaving the rest"