I would disagree on brexit. Am British and brexit sentiment predated the campaign by quite some time. Also many people eligible to vote for this and holding such anti EU positions were elderly, so if the Russian influence campaign was entirely online they would all have missed it.

Maybe Russia funded some campaigns, not sure. Maybe they were able to sway some voters, again, not sure. But my impression is that there was already a sizeable portion of the population pro brexit. I'd be more inclined to lay this at the feet of Murdoch than Putin.