If you ask what those sanctions were imagined to achieve, one, they were going to change Russia's mind. Well, they haven't.
Two, they were going to isolate Putin, remember? They were aimed at his oligarch friends and supporters. They were going to weaken Putin's power base and separate them from the leader. They haven't done that at all. If anything, they have consolidated his standing both with powerful people in the country and with the public. It seems quite clear to me that those sanctions don't work.
Furthermore, even while they impose economic costs, they have some effects that are surely counterproductive in the view of those who want sanctions. For example, they have in fact encouraged some revival in Russian agriculture, because agricultural products that were being imported, including pork from Canada in substantive amounts, no longer are arriving imported. That has now been an encouragement to Russian agriculture. It has in fact contributed to the diversification of the Russian economy, which everyone has always called for, thinking that it's too dependent entirely on the petrochemical sector.