you can not like DEP, but you can't deny their talent, particularly the drumming/ rhythm changes etc. I am also not sure how you can't appreciate their live show, as i have brought people who HATE metal early to shows just see them bc they are so entertaining on stage and you never know what might happen (Greg shitting on stage at Reading comes to mind).
Look at the list of musicians that have worked with members of DEP through the years. Most of the time a band is highly regarded by other highly regarded musicians, there's a good reason. There's a reason you don't see real artists beating down FFDP's door.