There is no way this is from a Russian security officer. We can unpack this part by part -- all merely my opinion + common sense:
- RF nuclear deterrence: this part is designed to allay fears of NATO citizens of getting directly involved in the fight. In what universe does a Russian spook undermine his nation's deterrence? So, garner public support for direct NATO involvement by claiming that military chain of command in RF strategic forces is non-functional, and (for bonus point) the weapons may not even work!
- Famine: this part is directed at the people of what is known as "global south". Under-reported in the West, the "global south" is either sitting this out or is voicing objections of Western hypocrisy and actually rooting for the Russians. Putting a little bit of fear of starvation in that demographics may provide political cover for their political classes.
- Chechnya: in the same alternate universe, a Russian FSB agent fans the flames of resentment of the locals in a separatist-ready corner of Russian Federation.
- Soleimani: this part is interesting. RF, of course, was not 'tricked' by Soleimani into getting involved in Syria. They got themselves a nice little piece of property (for ever, btw, for free!) on the Mediterranian. So little blackwashing of Iranians as well.
p.s. of course having this circulate in Russia will go a long way to demoralize the Russian public. It is transparent psyops.