Why isnt megadeth considered better than metallica?

Metallica cant make good music without mustaine and burton but mustaine can make good music without ellefson, poland and friedman.Metallica is living off of what burton and mustaine did for them in the 80s.Metallicas 8th and 9th studio albums stanger and death magnetic s*ck donkey testees while megadeths 11th and 12th studio albums united abominations and endgame are better than anything metallica has ever put out.So why do people still cling to lars,kirk and james hillbilly?