The 10 commandments doesn't appear to be a bad set of rules, but it has been revised somewhat. It asks everyone not to work on the sabbath. In an older version than the one used today, 'everyone' was more specific and included - you, your wife, your children, your livestock, your SLAVE! .... Surely one of the commandments should be 'Thou must not keep any slaves'? Also, with all these revisons going on, how do we know it's anything like the original, or does the origin not matter when we're just looking for a set of rules?
The other problem with most religions is that they require you to believe and trust wholeheartedly, without too many questions.
Why must I do/not do X? Because the good book says so.
Who wrote the good book? God did, via his prophets on earth.
How do you know that? I don't know, stop asking so many questions.
And then you have to question the morality of some religions. Some religions frown on homosexuality. So where does that leave the moral compass of a gay person, trying to lead a good life? I suppose they'd have to find a religion that accepts them, but it might frown upon some other thing, e.g. shaving.
I'm speaking as someone raised as a Catholic, went to a Catholic school, attended Mass every Sunday, until my twenties. But, when I die, I expect a humanist funeral.