If your only news source is RT you would have a somewhat warped view, just as you would with any single Western source. This column reads like someone trying to write about RT, watching a few hours and coming to the expected MSM conclusion. I do concur they spend a lot of time criticizing Western MSM, but that is their thing and a lot of it is very credible criticism. 

There is criticism of Putin and the Russian government, though muted/subtle compared to our MSM coverage. I find I will hear things on RT that are contrary to MSM and if I check more primary sources because of conflict with Western MSM sources I sometimes find biases of subtle distortions, but no more the Western MSM.

Finally, no one is telling the truth, whole truth and nothing but the truth about Syria, partly because there is no known truth and partly from home team bias whther it is RT, CNN, CBC or BBC to name four (from TV, newpapers are no different, though I have no Russian originating newspapers to compare)