I wouldn't say the Hulk fights like a 3 year old throwing a tantrum. I'd say he fights like an animal, he attacks based on instinct and his moves are based on the experience he's amassed over the years.
Now Abomination is more skilled, but the turning point of the fights usually is the Hulk is stronger. So eventually no amount Spetsnaz training is going to help.
Imagine a unarmed soldier vs a gorilla. Yes the unarmed soldier is better trained, and knows plenty of locks and holds and pressure points. But the gorilla is so powerful, and so thick skinned that none of thats going to mean **** when he's hammer fisting you wildly into the ground.
As of my opinion of Abomination. I'd say hes my second favorite Hulk baddie. Next to Absorbing man.