Honestly? Not I don't think they are because you don't win rigged elections by the skin of your teeth thanks to poor turnouts. The only time Putin has ever won by a high margin was in 2018, when the Trump administration had driven the USA's anti Russian rhetoric to a 30 year high. As explained in the post you quoted he only does well in polls when the west are threatening Russia economically or militarily, normally he polls on par with Yeltsin and below Medev-whatever his name is.
Okay firstly, not being overtly anti-Russia is not the same as being pro-Putin (the added comedy here is I've literally just replied to a post on a US forum where an actual Russian was flaming me for "Russophobia" xD).
Secondly, nobody is coming out with this crap, I'm not sure if you're intentionally strawmanning or just not reading properly but nobody is trying to say Russia didn't have troops in Crimea prior to their referendum, they've had troops stationed their for over a century, hell I even said they did in the post you quoted.
What you seem to be missing is that the fact Russia had troops their is completely irrelevant to the legitimacy of the referendum as they had zero effect on it's outcome, because as has been stated numerous times, the history of Crimea did not begin in 2014. This wasn't the first referendum Crimea have had on restoring their Russian citizenship (the last one in 1994 passed overwhelmingly however the result was Ukraine sending in the military to arrest the Crimean president, dissolve their government and effectively annex the republic).
Crimea never wanted to become part of the Ukrainian SSR, never wanted to become part of Ukraine when it became a country in it's own right and had basically been fighting to reunify with Russia for nearly 25 years when the vote took place. Of course it was going to pass overwhelmingly, nobody with even a moderate understanding of the regions history would expect any other outcome.
IMO he should grow some balls and start the sanctions rolling now to force them to pull back.
There's only really two reasons to move such a massive amount of your military equipment/troops to a neighbours border when they aren't being even slightly threatening. Either you plan to invade, or you just want to threaten them with invasion for political reasons. Either is completely deplorable and should warrant immediate punishment by the international community.