Am I overreacting? /u/LeGiant DnD: Roll for Initiative!

I have been DMing in and off for about 15 years and have ran a couple 3+ year campaigns. My current group has a play that does not read his character sheet or abilities. I have asked him several times to read the entire text of an ability before using it or asking questions about it. I have never had a player who doesn’t understand their character and is also seemingly not trying to understand their character. This has been going on for months, and it is just so tiring. My main question is will I be overreacting if I hand him a PHB and tell him to read it before the next session? I feel like this is my only option besides asking him to leave the group.

I have been DMing in and off for about 15 years and have ran a couple 3+ year campaigns. My current group has a play that does not read his character sheet or abilities. I have asked him several times to read the entire text of an ability before using it or asking questions about it. I have never had a player who doesn’t understand their character and is also seemingly not trying to understand their character. This has been going on for months, and it is just so tiring. My main question is will I be overreacting if I hand him a PHB and tell him to read it before the next session? I feel like this is my only option besides asking him to leave the group.