In counseling in the United States, counselors call that the "if you had only done this" statement. It's usually said by someone who thinks they know more than you know.
In the English language, saying "You could have avoided that problem" is typically followed by some IF statement. It means there was a different action you could have taken (or perhaps should have taken) to bypass or avoid the situation or problem.
You could have avoided those bullies if you had crossed the street rather than walking by them.
You could have avoided sitting in traffic if you had gotten off the highway.
You could have avoided getting into a car accident if you had kept more distance between you and the other car.
If someone has a problem with incontinence it could mean that they lose control of their bladder, or they lose control of their bowels. This is a common problem if someone suffers from dementia.
They mean whats the problem.
Keeping your employee safe from harm that could have been avoided.
It could be many things. It could be that you have asthma which is very common in people. If you have problem breathing you should see someone about it.
To call someone "crack" can be a derogatory term used to imply that the person is crazy, erratic, or unreliable. It is offensive and should be avoided in conversation.
Mean could be someone who is stingy. Or it could be the average (mean) of something.
You have an bad behavioral problem
Someone who is mean and controlling could be called a tyrant
It like fore in Golf. Shout track if someone is in your way while training so that a collision is avoided and the athlete does not have no change direction.
It means I've got no problem with that.
It could mean they care and are saying that sad, it could mean they think something is cute, or they could mean it sarcastically.
An easy explanation for a child would be that dyslexia is a learning problem some children have. Dyslexia makes it hard to read and spell. The problem is inside of the brain and it does not mean the person is stupid.