There are proactive ways to Stop any conflict or situation (war) one found himself. Boycotting Russian's own Gambling company might not be the best way to Stop the war. It will only affects the Nation's GDP, but remember other Countries will support Russian to Sustain during the war. If you boycott these companies, what of those people that have invested a lot.
Although it is a war tactics, but innocent people suffered the more.
The best ways to stop war are:
1. Set up a committee for the both sides of the war plus a neutral committee
2. Call the two parties for a dialogue
3. Settle the immediate and remote causes of the war.
With these I believe war can be called to a resolution stage.
I'm sure other countries have advised Russia to stop fighting, but what can they do if the Russian side doesn't want to stop the war? Other countries can form committees for both sides and call on both sides for dialogue, but there have been no good results so far. Maybe the Russians really have no intention of stopping the war until what they want is achieved. I think world leaders from all countries that are not involved in the war are already trying to stop the war and hopefully, the war can end as soon as possible.
We know that there are countries that still support Russia, and maybe that's why Russia still looks strong and doesn't show any desire to stop the war. But indeed, in this case, it is the people who suffer more from the war.