I'm sorry if this sounds mean, but I don't feel sorry for him in the slightest.
A few years prior Avery Bradley had just come off a terrible (and injury prone) rookie year, where he looked offensively horrendous. He was sent to Maine since he just was not ready for the NBA. We had an All-Star and future Hall of Famer go down (Ray) to injury, and Bradley by default got a starting spot. He worked/played so hard and was so effective that he permanently stole that starting job away from a perennial All-Star. Bradley was never nearly as talented as Ray - he earned that starting role simply by working harder than everybody else on the floor, every night.
I still remember the story of Jameer Nelson apparently complaining to Bradley and asking him why he has to be so aggressive on defense, and Bradley apparently replying with something like "this is the only way I can stay on the court".
To this day, that is still one of the most inspirational stories I have heard. It it perfectly illustrates why Bradley has been a long-term starter for the Cetlics, while Young cannot get on the court.
Bradley knew that he would never get given free minutes on a playoff bound Celtics team that featured three future hall of famers, and a coach notorious for not playing prospects. When he got his opportunity to play some minutes, he knew that the only hope he had of keeping those minutes was to simply work harder than everybody else on the court - and he did exactly that. He's been a starter for the Boston Celtics since that day.
Since then we have had guys like Jared Sullinger, Kelly Olynyk, Marcus Smart, Luigi Datome, Jonas Jerebko and Jae Crowder come through Boston - and every one of those guys came to Boston as an unknown, and found ways to prove to the coach that are worthy of consistent playing time.
Young also came in as an unknown entity, but he's been here for over a year now and has yet to convince Brad Stevens that he deserves a consistent role. Even the new rookies who have come in (Rozier, Hunter, Mickey) have seen playing time this year, yet Young has not.
That's only a reflection of the fact that James Young either isn't talented enough, or just doesn't want it badly enough. Perhaps both. He's letting rookies outwork him for playing time, and that's on him and nobody else.
The fact that he goes around looking like he's sobbing about it all only gives you MORE reason to not want to play him.
This isn't high school or college - this is pro basketball. This is a man's game. If you are frustrated because you aren't getting playing time, then force your hand. Go out there and work so hard that the Coach has no choice but to notice you. Don't sit around sulking and getting depressed, and hoping somebody will feel sorry for you and throw you a life line. If that's how you want to go about things then it's a perfect approach for earning yourself a nice long career - in the D League.