About 15 years ago I quit bowling with my brother because he just couldn't stand it when people would get brooklyn strikes or go thru the nose and strike.  He thought he was better than he was.  He felt he put 9 out of 10 balls in the pocket and should have struck every time he put it there.  He was caring a 190-195 average at the time.  
The straw that broke the camels back was when we were bowling a team that had lots of handicap.  They were getting very very lucky.  They were having a "career night" as a team.  I tried to calm my brother down but the more he watched, the luckier they got(so he thought).  Then he would throw a pocket shot and leave a ringing ten. He did this a few times.  The last time he did it, he came walking back and put his shoulder right in the chest of the biggest guy on their team(guy was standing in walkway between counters in back of bowler area). This guy is 6'6" about 280lb. I thought, oh cr@p here we go.  Luckily for my bro and probably me too, the guy was pretty cool headed. He probably figured the arse whoop'n they were giving our team in bowling was enough.  After that confrontation, I went back and tried talking to my bro to calm him down and then he flew off the handle at me.  That's when I said, enough is enough.  I've never bowled on a team with him since.  His son started bowling with him 5 years later when his son was 12.  His son quit bowling all together after just 2 years bowling with his dad.

No offense, but 190-195 isn't good.  He should realize that some people are just lucky and are there to have a good time.  I know people like that.  He is probably a hot head at other things too.  I try to stear clear of those teammates.  That attitude is why some people are turned away from league bowling.

I have been guilty of being hot headed in all sports.  Starting to calm it down as I get a little older, but it still creeps in every once in a while.  I don't usually say anything to anyone other than myself, but it is heard by others.  I cuss myself out for throwing a bad ball, even go as far as to blame the lanes on occasion.  But to root against someone like a 60 year old in a mixed league, or to physically assault someone.

Hell I feel better about myself...lol

Sadly, the only person I've ever had to "fire" was an older man who started to succumb to dementia.

He was in his 70s when he started bowling with us and he wasn't all that good anyway, but we needed a person and he was reliable and paid every week (a very underrated quality in league bowlers). His wife would bring him and she was a complete sweetheart.

About midway through the first season, someone said something that he took offense to -- I don't even remember what, and it wasn't about him -- and he flew off the handle. We thought it was weird but let it go.

He started to have more frequent outbursts and finally, after his second season with us ended, two of the other guys on the team gave me an "us-or-him" ultimatum for the next year. It was pretty clear he was losing his cognitive ability.

I called his wife a couple of times trying to get in touch with her to tell her (I figured it was better to deal with her than him), and left a couple of messages. A day or so later, he got arrested for stealing a handful of 5-cent candy from a gas station and pulling a knife on the clerk. That took care of our problem for us.

Jess