No, we really don't.
For this rather wild speculation to have happened:
* The Russians would have had to know exactly which counties would be swing counties, in at least three different states, two of which nobody imagined Trump even had a chance in, in an election year when the best pollsters and analysts in the United States were caught completely flatfooted by the results all over the country.
* They'd have to be lucky enough to pick swing counties that use electronic voting. For example, in Wisconsin there's a mix of electronic and paper ballots across the state.
* And they'd have to know exactly what the vote counts would be weeks in advance so they could slip in ju-u-u-u-ust enough extra votes to give Trump a razor-thin margin of victory.
Look, I realize the election results were traumatic to lots of people, but if you cling to conspiracy theories to avoid dealing with that you're going to spend a long time in the wilderness. I'd advise you instead to work on persuading more people that your political program is the right one. It'll work better in the long run.