Boston Celtics All Star point guard Kyrie Irving has expressed his frustration several times in recent weeks, some of which has nothing to do with the Celtics' lackluster performance on the court this season.

Whether it's the ongoing speculation about his impending free agency, or the constant attention that comes with being a superstar player, Irving has made it clear he'd just rather be left alone.

During an appearance on ESPN today, Charles Barkley shared his thoughts on Kyrie, who he described as "one of the most miserable people I've ever seen."

Barkley's remarks come in response to comments Irving made to reporters in the last few days.

Earlier this week, the Celtics star told reporters, "I didn’t really come into this game for there to be cameras in my face, be famous, be a celebrity, so it’s a little hard for me. I wanted those things when I was younger but at this point in my career, I just want to play basketball at a very, very high level.”

After Tuesday night's blowout victory against the defending champion Golden State Warriors, Irving added, “The business part of it is what makes it terrible for me, honestly. Dealing with all this shit. ... The basketball part: I have to keep that fun. That’s where I’m great... That’s what makes me happy.”

The Celtics, 39-26, are currently sitting in fifth place in the Eastern Conference. Their four-game West coast trip continues Wednesday night in Sacramento, followed by games against the Los Angeles Lakers and Los Angeles Clippers.