"It's a hard job being a manager, he's brought players in and you have to give them their chance," said Best to the CT.
"You can see from the stats that the players that have come in have played a lot of games and done well together, but I'm frustrated with my season because I could have done a lot better.
"There have definitely been times when I felt I should or could have been playing and haven't been and that was when I wasn't injured.
"When I have been injured, I haven't been playing but you don't think of those times because you couldn't have been playing. It's the times when you are fit and flying and training well and still not playing that you think of."
Best who is out for the rest of the season has only scored four times this season in eighteen starts with sixteen sub appearances and added: "As a striker, you always want to score more than the season before but I haven't played half as many games as last season.
"I've come on as a substitute quite a lot and I've only come on for a few minutes and you can't do much then.
"I have been unlucky with injuries. I'm disappointed because I want to be playing as many games as I can but it's just been injury after injury.
"It's hard coming in and out of the team. You need to get used to playing week in, week out, becuase when you are in and out and you come back in and give it 100 per cent, that is when you pick up injuries.
"Things like the broken cheekbone are just things that happen. "My medial ligament wasn't right for a while and you need to build that back up and get your strength back.
"I have had knocks here and there and a couple of stitches in my ankle that kept me out. This latest injury has just killed my season."