It's a tough call. Getting cut is never easy. Unfortunately the coaches saw something in the other players that made it and you didn't have it.
Maybe you have some better 'skills'. But maybe you made some mistakes when the coaches were watching and then excelled and made some great plays when they were not.
Also someones being cocky can be a down fall. Because sometimes you think you may be better than you are. And you tend to exude unsportsmanship like conduct. Talking trash about those you think who suck, or shouldn't be on the team, not calling the ball or plays when you are able, thinking you have the ball when you don't. Going after everything when you shouldn't. Lack of motivation or team spirit due to thinking you are better than some.
I am not saying this is what caused the issues. But it is a potential reason. If you have heart, show team work, camaraderie and can call the team plays (in in in, out out out, I got it, I go, long, short, block, tip dump etc) you are more of an asset even if you can't bump or set or pass or spike all the time. Sometimes having the right demeanor for the game as well. If the coaches think you are going to be drama for the team, they might pass on you.
All I can say is to talk to the coach. Ask if you can sit practice with the team on occasion. To get better. And sit on the bench and watch the team so you can learn. And then try to again next year. There's not much else you can do. Unless you can ask the coaches for a second chance and to try again.