As for preciseness, the newer ballistics have precision of over 90% (thanks, US designed chips). Older ones probably 75%. Their biggest weakness is access to chips.
And the imprecise hits are coming from the Tochka-Us, an old system that mostly the Ukrainians are fielding - but maybe pro-Russian Ukrainian separatists forces some, too.
Check out this book: https://www.amazon.com/Losing-Military-Supremacy-American-St...
Ok, so they are bombing civilians on purpose, is that what you say?
It is no secret that much of the good Soviet tech was produced in Ukraine, both tanks and missiles, and without maintenance they won't be as precise as they were supposed to be. And for some reason Ukrainians hasn't wanted to do maintenance on Russians tech the last few years.
That said we've also seen plenty enough evidence that Russians shoot civilians on purpose.
Do you have access to a computer and basic Google skills?