There’s a massive gulf between the very effective disinformation efforts Russia is involved in and running a TV station.
TV broadcasting is very expensive, takes a lot of man power and is unlikely to make any significant difference in the short run because it is clearly external and hence naturally assumed to be propaganda (which clearly it will be if it is going to achieve the purpose)
Russian disinformation campaigns focus on astroturfing support for groups that disrupt the status quo and politicians that work against their interests. Examples are the funding of the NRA to disrupt the Democrats and support Republicans. Support for AFD in Germany, övp and fpö in Austria, LePen in France, Brexit in the UK etc
Campaigns of that type are difficult in Russia due to it being a dictatorship, but even so they’re more likely to be successful than broadcasting BBC in Russian or what ever you had in mind.
TL;DR you’re comparing apples with oranges. A TV station is not remotely similar to Russia’s disinformation campaigns