Imo no. He’s so far failed to bring either the whole of Ukraine or the border region under Russian control. The north eastern border with Russia remains Ukrainian. So far he’s got the separatist regions and a land bridge to Crimea. He may have deterred Ukraine from becoming part of nato, may not, it’s not clear yet. What is clear is that Ukraine is now an enemy of Russia, capable of winning, and supported by the West. Even if they’re not NATO they’ll be a NATO trained and armed ally, motivated, experienced and confident in facing Russia.
His actions have also led to the Nordic buffer stat