"The first Putin I met was Western-facing, anxious to have a good relationship with the West...
Putin's first trip to the West was to 10 Downing Street in 2000.
"Then, I think he found the challenges of reform and change in Russia too great and he decided to consolidate power..."
I have speculated on exactly this reason. Democracy is hard; it takes a village, an intricate support system. Putin couldn't do it. The Russian people couldn't do it. They didn't understand puts and calls.