"legitimate target" is a dog whistle for commiting a war crime. You are describing one.
What? Do you live in a world where there aren't legitimate targets? A legitimate target is, for example, and piece of military hardware. Something that isn't is, for example, a water treatment facility.
Please wake up. You're filled with propaganda just as my folks who initially supported the war. Assuming you are not from Ukraine, I want to just recommend you stop watching war related content in social media. This thing poisons how you think and feel the world.
So should Russia just be allowed to have it? No. Fuck off. I don't vibe with appeasement. It didn't work with Nazi Germany before WWII and it won't work for Russia. If they get Ukraine then they'll keep going. They've already threatened other nearby countries.
If you don't like the war, tell the invader to stop fucking invading. Don't tell the defender to stop defending their home. Your friend died because people like you exist. It's your fault and their blood is on your hands, as is every other Russian who has died just to sate Putin's appitate for building a legacy. He doesn't give a shit about you, and this invasion only hurts you. Grow up.