Why isn't there more effort from organizations to educate Sikh parents on building healthy, balanced relationships with their children, considering some parents can exhibit toxic behavior?

Your concern is very important and the undersigned is aware about one organisation, The Living Treasure’, which works on this front also. But the bigger problem is, who will make the parents aware that they need education, to improve their relationship with children. Perhaps, the children will have to take initiative to make their parents realise this.