Of course they should change the government but I don't think it's possible to achieve that through elections.
Why would I value invaders lives over that of their victims? I still haven't seen a russian 'opposition' do anything than play victim card while their army butchers people. Or Ukrainians must die protecting their homeland while russians be like 'oh no, putin scary, we just sit home and pay taxes'?
No resistance, just compliance.
Ideally the whole regime would start infighting and implode to hell, but ordinary people won't start the process I'm afraid... although the recent fuel shortages could give us some hope if they last long enough.