The West should escalate in a hidden way by sinking several Russian Boomers and put out a press release - "What happened? Oh dear, how sad, never mind."
I can understand the emotional response to Putin's war crimes, however a military action against a part of Putin's Strategic forces would be an act of war, which would be highly likely to start WW3.
Destroy the rail link of the Kerch bridge, and major rail hubs, plus striking any rail links from Russia into Donbas or Crimea into Zaporizhia would be a legitimate and effective response.
Removing Russia for the UN SC would also be legal and appropriate.