Please help me with a conclusion for my paragraph...

Eric Yiadom is a hotheaded volcanic tempered basketball player whose attitude often leads others to malign him. He is tall, slim with dark olive skin and has short red hair as hot as his temper. On the court he lacks sportsmanship. Always causing a tantrum and putting others down after games has been lost; his eyes will cringe, and become infuriated, yet he will start making excuses to why the game was unfair. Seeing the heat radiating through his body you’ll see the death in his eyes and steam steaming out of his ears, as if he was out to kill. Not only is his attitude a problem when it comes to his personality, he is self-centered. He thinks highly of himself, and will turn any subject around so it's about him, and then proceed to ramble on about himself.

hotheaded, volcanic-tempered = redundant; choose one of these adjectives and delete the other

insert "and" between "tall" and "slim" and delete the comma

Always... = fragment, not a complete sentence; fix it
http://grammar.ccc.commnet.edu/grammar/fragments.htm

eyes cannot cringe; find a different verb; also start a new sentence with "eyes"

as if he were (not "was")

"personality, he" = run-on; fix it
http://grammar.ccc.commnet.edu/grammar/runons.htm

For a conclusion, add what you think will happen to him in the future. Will he turn pro? Will he become a nicer person? What?

In conclusion, Eric Yiadom's hotheaded and volatile temperament, along with his lack of sportsmanship on the basketball court, have earned him a reputation among others. His fiery red hair and intense expression reflect the anger that simmers within him, causing him to lash out and make excuses when games are lost. His self-centered nature only exacerbates the problem, as he constantly steers conversations back to himself. It is clear that Eric's attitude and behavior both on and off the court present significant challenges that he must address in order to improve his relationships and sportsmanship.