Jr. got a $50k/month gig on a BOD - by itself, that's not an outlandish amount (many boards provide compensation packages that are much higher.)
The US wasn't the only country pushing for the removal of that prosecutor...news articles at the TIME:
https://www.irishtimes.com/news/world/europe/eu-hails-sacking-of-ukraine-s-prosecutor-viktor-shokin-1.2591190
https://www.nytimes.com/2016/03/30/world/europe/political-stability-in-the-balance-as-ukraine-ousts-top-prosecutor.html
Where's your evidence?