Why are these megadeth and maiden albums so hated?

Ok when it comes to megadeth,everybody says killing is my bisuness sucked when its a thrash metal classic.Just listen to rattlehead,chose ones and the mechanix and tell me how its sucked,the only bad song was the "these boots" cover.Risk was hated because it had the audacity not to be metal.I definatly like the classic megadeth sound better but it was refreshing to see megadeth explore industrial.There is plenty of good songs on that highly underated cd including insomnia,breadline,seven,time the beggining and end.I hate how people trash bands when they change there sound and the music doesnt suck.When metallica tried to be hillbillies on load and reload I hated those albums because the music sucked,not because they tried to be different.With iron maiden,i believe that maiden ceased being a great band after the 80s but the x factor and virtual 11 are rock solid albums.Everyone hates these albums because blaze bailey and not bruce dickenson is the vocalist but the same people love the paul dianno albums so thats pretty stupid dont you think?