On the contrary they seem to be doing much better than anyone expected, maybe even themselves, and they appear to have successfully stopped Ukraine from ever joining NATO which was absolutely their main objective, just see what they have been saying since 1992.
The initial expectation was for Ukraine to fall in weeks. The convoys that were headed for Kyiv had Rosgvardia in them - that's basically riot police, not military troops, and they were equipped as such. So no, they were absolutely going for the whole Ukraine (as a puppet state in the west and probably annexations in the east) and instead got stuck in the worst meat grinder Russia has seen since WW2.
