There are many factors that affect this.
Do you play high level? The higher level you play at, the more likely it is that power gaps happen.
What about your players? Are they system analysts? Do they play the way the 3.X playtesters did? Are they nice enough to not overshadow the weaker players? Do they know what CoDzilla is?
I dispute the claim of "weaker" players. The presumption there, imo, shows the problem. Now, I DO play with people who like to be part of a cool story about cool characters rather than trying to "beat" the game regardless of of how disjointed their buold may be.
You may not have had those problems, but there are plenty of people who do! Are they all playing the game wrong? Is D&D not for them?
Oh, I absolutely admit that people have this problem. It would be silly to argue otherwise. But it is not a symetric issue. If it was a systemic problem it would be impossible for me NOT to have the problem.
There are people who also can't hit a curve ball. I'm one of them. No one can it a curve ball with a broken bat. But blaming may inability to hit a curve ball on the batt is just making excuses.
The D&D I play is made for maximum adaptability. I won't call anyone's play "wrong", and if you pay attention to my posts you will know I have stressed that idea numerous times.
However, there are a ton of people who play the game "wrong" if you add the presumption that trying to achieve the experience *I* desire. 3E can absolutely be abused, the system is not burdened with safety rails that limit options in exchange for reliability.
If CODzilla is a real problem in your game, then you are not playing a game best suited to your play style. But your play style is vastly different than mine.
But in my games, through a wide range of levels, players agreeing to work toward awesome STORIES have a great experience.
If CODzilla is fun to you and is your goal, awesome. My preferences are different, but they have zero claim of superiority to that. However, if someone were to claim they are focused on the story AND that CODzilla is a problem, then I WILL question to consistency of those claims.
There is no badwrongfun goal. But 3E can be palyed toward different goals, and if you want one and play toward another then THAT is probably "wrong".