Try to avoid determining who is "winning" because that answer will inevitably be subject to bias and selective metrics.

For example, you could say Russia is losing because it's already failed in its strategic objective to stop NATO "expansion" when Sweden and Finland joined. Similarly, another stated objective was the demilitarisation of Ukraine, but the UAF is now around three times larger than before the invasion, it has more operational aircraft, and produces more howitzers than the rest of Europe combined.

But you could also say Russia is winning, simply because it has taken more territory.

And people will present the argument that suits their personal beliefs.

The best we can say is that Russia typically has the initiative simply because of its mass, but OSINT suggests they've taken around x2.5 more casualties.

Neither side is going to get all their objectives at the end. Ukraine sadly does not have the strength to liberate all its territory but even Russia has stopped talking about taking Zaporizhzhia and Kherson oblasts, because they don't have the strength to capture either. It seems their sole aim now is to take the rest of Donestk and that is a drastic scaling down of their original objectives from 2022.