Again, what do you want them to do? Should Russia be allowed to just have it? Russia is literally bombing civilian housing, which Ukraine isn't doing. They're the invader. Letting them have their way supports war crimes because it shows they are beneficial.
If Nazi Germany was stopped when they first started invading other nations, we probably wouldn't have had WWII. The same can be said here. Hell, they should have been stopped after the first invasion of Crimea, or even Chechnya, or maybe Georgia, especially after the genocide.
I'm against war crimes. That's why I'm against nations invading other sovereign states. I hope one day you'll stop justyfing them by siding with invaders while your countrymen are slaughtered. Ukraine stopping fighting back doesn't stop war crimes. It only gives Russia what they want and then they'll continue to commit war crimes somewhere else (assuming they don't commit another genocide right there too). If you're against war crimes, you stand against invaders.