Would not have been possible if the candidate was someone besides an unlikable, empty corporate suit who talked down to her base. Russian activity mostly focused on getting out right-wing troglodytes.
Blame still is ultimately with Clinton and the Democratic establishment for failing to support a worthy candidate. The fact that she couldn't even beat Donald Trump is the proof of her unelectability, regardless of interference.
She would not be anymore electable today than she was before, because the demographics have changed forever and neoliberalism is politically bankrupt. It's a dead end.