Does Putin Regret Helping Trump win the U.S. Presidency?

In mid-June, I attended the annual British International Studies conference (BISA) in Bath, England. One of the panels that I was present at was entitled, ‘Trump and the Unpredictability Doctrine,’ where I listened to a paper by an academic working at Leiden University on Trump’s political volatility as it relates to Russia. My colleague from Leiden said that predictability is not only important for allies but for enemies as well. While I am not sure if Trump thinks of Russia as an ally or a friend, this statement led me to an out of left field thought: based on Trump’s overall performance in the Oval Office, has Putin ever regretted that he interfered in the 2016 campaign with the express goal of undermining Hillary Clinton’s electability as president