The meddling in the elections in the US the Russians are being accused of has nothing to do with the actual election systems. It's related to impacting the public perception of a candidate by releasing dirt on one at opportune times.
Or, more likely, to counter one propaganda you are just parroting another piece of propaganda.
Geopolitical inevitabilities aside, though, there is plenty of evidence for both the US and Russian governments' manipulations of other countries' elections.
Blaming convenient phantoms is sidestepping the problem.
For example, I have quite a bit of trust in the CDC. I have less trust in the EPA. Trust is hard to earn but easy to lose.