Do you have any evidence to back this up?

Look at Civilian vs Soldier dead for various major wars.

Only ONE war has WAY more soldiers killed than civilians. If Russia is trying to target Ukrainians, they are doing a worse job than any war you can name.

                 Civilians  Soldiers
    WW1              10M         7M
    WW2           50-55M     21-25M
    Korea           2.7M       0.8M
    Vietnam         2.5M       1.1M
    Kosovo          1-5K     0.5-1K
    Afghanistan     500K[1]    100K
    Iraq            135K[2]     40K
 
    Ukraine[3]        9K    65-250K

[1] I don't trust US numbers in Afghanistan. There are prominent cases like the US claiming 25 casualties in a village when there was video evidence of many more bodies not mentioning all the bodies vaporized by the bomb.

[2] Another definite lie. Studies done in 2004 and 2006 published in Lancet showed around 1M excess deaths of which almost all were directly attributable to the war and at least 31% were directly attributable to US forces. Who knows how many people died in all the conflicts that followed in the next 15 years. The US officially rejects these studies as flawed, but the British MoD considered it to be robust and adhering to best practices. Further, it used the same methodology and team the US considered to be stellar when doing the exact same thing the exact same way in the Congo.

[3] From the Ukrainian MoD and/or Ukraine-leaning groups, so the likely bias is to overstate Civilian deaths, overstate Russian KIA, and understate Ukrainian KIA.