Why have Ministers and Preachers stopped preaching on Hell?

This is a very good question. The hell concept looks and/or sounds complicated, bet it actually is easy to understand. The reason most preachers do not preach on hell may simply be because it is not of interest to them. Most preachers are now preaching on things that will bring their churches money such as tights and other related stuff. As a Christian, you must not focus on your religious leaders. The path to everlasting life must be followed by only you and only you will be judged. Reading the bible is the best solution. Do not try to understand the hell concept at this time, but just know that, the wages of in is death and when you die in sin you belong to the devil and he can do anything to you. I believe that when the right time comes, you will understand this perfectly.

Well, I think that may be a blanket statement and not necessarily universally so, but maybe the pastors/teachers that you have encountered have woken to this truth:

Romans 2:4 - Or do you despise the riches of His goodness, forbearance, and longsuffering, not knowing that the goodness of God leads you to repentance?

While it's true that if you reject Jesus then there is no salvation left for you and you will not spend eternity with him in fullness of Joy, it's not the Gospel. The Gospel is literally Good news. The nearly too good to be true news.

I'm not sure if you've noticed that if you try to teach your children how bad something is if they do something you don't want them to do it actually has the reverse effect and they do it anyway.

The bible says in

1 Cor 15:56 - "The sting of death is sin; and the strength of sin is the law. "

Preaching hell isn't the Gospel and isn't going to save anyone. We need to be sharing the good news.

The world is so full of suffering and pain these days, the last thing we need to hear is that we are going to burn in hell. I think that pastors and spiritual leaders recognize this. Maybe they are trying to give encouragement and hope to their sheep instead of more fear?

I'm not sure if that is why they don't grill people with that anymore. It seemed to work. I can see previous generations before me, have a stronger moral compass. This could be that they are so afraid of god they won't even think twice of doing something wrong.

I myself don't believe in hell. It doesn't make sense that a god of love, peace, justice, and righteousness would watch something he created suffer like that. That combined with the accounts of Gods punishment. Whenever God punished people, their deaths where quick and they didn't suffer long. Deuteronomy 11:6:

"Or what he did to Da′than and A·bi′ram, the sons of E·li′ab the son of Reu′ben, when the earth opened and swallowed them up, along with their households and their tents and every living thing that followed them, before the eyes of all Israel.

Genesis 19:24-26

"Then Jehovah made it rain sulfur and fire on Sod′om and Go·mor′rah—it came from Jehovah, from the heavens. 25 So he overthrew these cities, yes, the entire district, including all the inhabitants of the cities and the plants of the ground. 26 But Lot’s wife, who was behind him, began to look back, and she became a pillar of salt."

Even that aside, once we die our sins are paid in full. Romans 6:6-7:

"For we know that our old personality was nailed to the stake along with him in order for our sinful body to be made powerless, so that we should no longer go on being slaves to sin. 7 For the one who has died has been acquitted from his sin."

So if God views our sins paid for by death, then why would he punish us after our sin debt is paid?

I think if someone's love for God is strong enough, they don't need to learn punishments. To illustrate the point, your father teaches you not to do something because it is wrong. If you love your father, you care enough that you don't want to disappoint him by doing something he told you not to. I don't think of the punishment for something I've done wrong. Instead I think about how much I've hurt someone who loves me, so much that he sacrificed his son, so that I could have a chance to live.

Like any topic, if a person thinks it is important, they will talk about it. You may draw your own conclusions as to why some Pastors do not teach on Hell therefore.

Jesus spoke a lot about Hell. Guess He thought it was important to do so.