From Memory, the bombing WAS S7's fault as the woman had been stopped from boarding after being flagged. But after the paying of a bribe she was allowed to board, and blew up the plane.
And these Wiki facts are only the ones that make it into the English press.
This mob have had a bad reputation in Russia since birth.
I really hope things have changed in their management, culture and equipment, but I fear a generational change, not overnight.
It's really the ground staff and maintainance that cause concern in any of the Eastern block airlines. There is not a good work ethic, corners are always cut. Parts are dodgy.
Just recently the senior pilot of a transcontinental flight had to be evicted by the passengers before take-off for being drunk. I myself have witnessed cabin crew smoking in the toilets, and drunk passengers using mobiles during take off and landing.