Hank should be proud of Walt.

Walt single-handedly destroyed the meth bussiness in New Mexico.

Thanks to Walt, Gus was able to wipe out Eladio and his cartel. Walt killed Gus and the last remnant of said cartel. He then proceeded to corner the market and left the bussiness in the hands of Todd Alquist and Declan. Jack and his men took down Declan's operation. At that point, Jack Welker was the sole source of meth in the area. Walt then killed him to avenge Hank and allow Jesse to escape.

Walt cornered the market, destroyed it, and accepted his own death, effectively leading to the complete halt of any kind of large scale meth distribution in the New Mexico area. He made a bigger dent in the drug trade than the DEA ever could.