They certainly haven’t held back in Syria. But probably my biggest memory of urban destruction in the fight against ISIS was the aftermath of US-coalition bombing of Raqqa and Mosul.
Don’t know if Airwars are reliable or anything about their methodology, but they’ve a reputation for reporting on all sides. They claim to have estimated up to
6,000 non-combatant deaths in Syria at the hands of Russian forces up to the end of 2019, and up to
13,000 non-combatant deaths in Syria and Iraq at the hands of US-coalition forces up to the present day. Unfortunately no assessment of Saudi-led carnage in Yemen.