These countries weather boom/bust cycles in oil prices, waiting for a 'someday' to refill their coffers, and every year there are more and more things trying to put off 'someday' a little longer.
Essentially these countries have an antagonistic relationship with the rest of the world, as do quite a few corporations really. If you only get good news when everyone else gets bad news, then you've made an enemy of your customers. They just might know it yet. Lots of them will be working in an uncoordinated fashion to make their bad news a little better, making your good news worse and worse.
They were only able to do it because Saudi Arriba was willing to take almost all of the cuts required. In the 1970s opec vot better compliance, but cartels tend to fail because it is the benifit of the individual to defect while everyone else makes cuts. Saudi Arriba is not able to make deep enough cuts alone though, and it is hard to see anyone else making them.
I know it is the southern end of New England but a friend of mine in Connecticut just switched to a pellet stove for heating his large home. He plans to pay for the stove in two winters worth of heating.
Electrification is the longer term existential threat. Even if 20% of vehicles are electric, the impact on demand and oil prices will be profound.