

They don’t need to push Russia out so long as Russia is losing far more men and equipment. This is a war of attrition and despite being far larger Russia is losing.
Fighting age men and equipment are finite resources.
They might gain ground now but Russia will be unable to hold it, assuming that the EU and US continue to back Ukraine.

The US is still sending weapons. Check that reality.
Of course Ukraine doesn’t have infinite resources but they are spending theirs much more wisely.
Russia is already a pathetic shadow of its former self and its only downhill from here. Broke bitches thinking they’ll own Europe hah.