Meh... I've never felt sorry for an opponent. I beat my wife's brains out on our second or third date, when I took her to my home pool room, City Lights in Tacoma, WA. It started out as regular 8 ball, and I basically ran out every time she missed. Then, I told her I would bank the 8 ball to give her a chance.
I tried real hard to plan my last three balls right so I had a hanger bank. Then, the spot moved to me playing one handed and her playing regular.
I tried as hard as I possibly good to run out on her every time. The spot eventually ended up where I had to play one handed and bank the 8 ball wherever my last ball fell. That made it an even game.
Not telling about that to brag, just to illustrate that I'd try to beat my own mother 11-0 if I had to play her a match. All my friends who ever played me knew I was going to try my absolute hardest, and they did not take it personally. If it was just some guy in the barracks I was playing (I was in the Army), I tried to absolutely destroy them.
I remember one kid I played a lot in the barracks.. He was pretty good, and could have been a great player if he got a good practice regimen going on good equipment. After I took a month off to practice, I came back and played him, and beat him so badly over a number of non gambling sessions, he ended up giving up pool. I didn't feel bad one bit about it either. I considered that pool table in the dayroom mine, and if you stepped up to play me on it, you deserved what you got. I ended up buying his Meucci cue off him and an awesome price when he quit, too. Bonus!
Danny McGoorty used to say he had to hate his opponent while he was at the table. That's what works for me, too. I want to crush my opponent's spirit when I am at the table with them. Imagine, if I end up playing some real good young player in a big regional tournament, and I slack off for one shot, and he gets a rack that he otherwise may not have. Then, he runs a few racks, but still loses a match 9-4. He'll think.. "9-4 is not that bad, I'll get him next time." If I played him so hard that I bear down the whole match, and I don't give him that shot, he might get beat 9-0. I will be in that dude's head every time I play him. He better be a mentally strong player to put that beating out of his mind.
What I guess I am saying is this. That weaker player that you can't play hard against.... He might be a real player one day. Beat him now... Beat him often. Beat him badly. He'll either quit playing the game... or he will really push himself to get better, to avoid getting beat 11-0, 10-0.
I used to think it was my responsibility to beat younger players as badly as possible, to separate the wheat from the chaff. If they end up giving up the game early, they save themselves lotsa money on table time.
Russ