Maybe it's his 3rd term in office?
In lots of countries that is allowed. Remember all men are equal. So if the Russians decide that 3 terms is acceptable, then who are we to impose our opinion on them?
Or maybe the allegations of cronyism and corruption?
Allegations? Hillary Clinton was alleged by certain detractors to have murdered one of her former law partners. Russia is certainly not unique in having "allegations" directed at politicians. Allegations are not proved.
Perchance the declining health care standards or the highest rate of depopulation since Stalin?
Health care standards depend on the economy, and our health care standards are threatened by our poor economy, too.
Depopulation is a very serious issue, but Putin has supported aid to families who have children.
Perhaps Chekism has a bit to do with it? Maybe they just don't want someone with KGB ties in office anymore?
Maybe they do, and maybe they don't. Other people are our equals and they can well make up their own minds at the voting booth.
If you can manage I suggest reading some of what Andrey Illarianov has written since he resigned about Putin's Russia. Another resource I found particularly useful in my dogged pursuit for further knowledge is: http://www.freedomhouse.org/search/russia
I notice that you need to resort to sarcasm here.
What troubles me is that so many people will just mindlessly scoop up whatever memes that Soros feeds into the machine, that is, TV: Madonna = good; Putin = bad. To judge a politician, you really have to live in that country. As I said before, our only defense is critical thought. And, yes, the TV is sometimes wrong.