There is so much wrong in this thread its hard to know where to start. The incident was investigated by the Spanish authorities, FAA and Delta Air lines. All 3 reached the same conclusion. The crew turned in a flawless performance.
The first indication of trouble was a bang at rotation. At 400 feet per Boeing logic multiple cautions and warnings came on. They lost the C and R hyd systems and breaking on the right truck. They also lost the right reverser. They assessed the situation and made a decision to make a overweight landing rather then circle a long term to burn off fuel since they were down to 1 hyd system. Only center fuel can be dumped and that tank was emptied. Approach speed was about 168 knots. All gear and configuration changes had to be made with alternate systems.
The landing was in the middle of the touchdown zone at the correct airspeed. Only braking available was the left truck and left reverser. The aircraft departed the runway off the left side and came to rest near a taxiway with minimal damage.
The investigation did not find or see any possible way to maintain the aircraft on the runway. The excursion off runway was at low speed after rudder effectiveness was lost. The incident was documented by the FDR and multiple cameras at the airport.