Your list is obviously slanted to push an agenda, but here goes.
2) The US laws are more restrictive than the rest of the world
This is backwards. You can only be extradited if the act is a crime in both the US and the other country, and if the punishment in the requesting country is not extremely out of line compared to the requested country's, so if the US laws were more restrictive it wouldn't increase the number of extraditions. On the other hand, many countries would like to extradite people from the US for crimes that are not a crime in the US, like for insulting the king, and for others the potential penalty is considered too harsh, such as flogging, have a hand cut off, or even execution, for crimes like theft or drug offenses.
1) US criminals are so smart they never get caught
I think this missed the mark some. More likely, the investigative ability by US authorities is better than most other countries, so the US is more likely to be able to determine who committed the crime, and to where they fled. You can't request extradition unless you know whom to extradite, and from where. You can then add in that US criminals may be better educated than the world average for crooks, so are better at not being caught.
And a few more potential factors you missed:
4) If a criminal flees from a non-US country, due to extradition treaties they are much more likely to flee to a country other than the US.
5) A lot of the recent extraditions are for cyber activities (like this one), but there is a disproportionate cyber presence between the US and most other countries, both in terms of number, and in terms of wealth that makes it more likely for a Ukrainian crook to commit fraud against a US person or company than it is for a US crook to commit fraud against a Ukrainian.
6) For similar reasons, namely wealth and wealth disparity, US entities get targeted more than many other countries. For example, people from South Africa are much more likely to come to the US to steal than a US person is to go to South Africa to steal. If they flee back home, who is going to asking for extradition from whom, and in what kind of numbers?
There are more, but I think that gets the point across.