There could be a number of reasons that caused his problems.
Usually, the absence of a "voice of reason" is the cause of an ego running out of control. An entourage of "yes" men throws nitro onto the problem. I am sure one slap in the face from mom from time to time would have helped, but that wasn't able to happen. It's really a shame, and everybody loses..
That situation is extremely, extremely unlikely in the Lucas Family.
Just an outsiders observation and preception here:
First and foremost, Lucas is a businesman, Knoll is not.
Forrest Lucas came from nothing "and didn't forget it". He was a truck driver who knows what being broke is all about. Both he and Charlotte seem to be well attached to their roots. I am sure if one gets feeling a little "full of themselves" the other quickly fixes the problem. Although Morgan has had the luxury of being born and raised in an extremely wealthy family, he carries himself in a way where you know his mother and father are always aware of where they came from, and they seem to live life while keeping their apparent successes in check..
Lucas Oil doesn't sell "car wax" or "skull shirts" and try to live like a rock star on an undeveloped, low profit product that nobody outside of the NHRA fan base has heard of, wants, needs, or most importantly, where nobody can get.. Not a good business plan, and because the product and distribution were not allowed to fully developed first, all of the drag racing sponsorship advertising could do nothing for sales.
Lucas sells oil products that are successfully distributed to a store within a mile of everybody. You can buy a Lucas product almost anywhere that sells oil. Buying the naming rights to the Colts new stadium now introduces Lucas to tens of millions of unaware, "non" motorheads all across the world. It was a brilliant move that could only be made after the rest of the sales and distribution network were fully in place.
You guys are going to hear the Lucas Oil name said a million times during the upcoming football seasons. EVERYBODY will know who they are and what they sell.
Look for Lucas to become one rich, rich, man...
Please, do NOT compare the Lucas family with that other guy.