Not sure why you can't express how you feel about any art and design even if you did find it disgusting! Artists and designers put themselves out there which I respect immensely but if you haven't got a thick skin by that point then sheesh wrong business!
Whilst I don't agree that the artwork is 'disgusting' surely the OP is allowed to state an opinion?
Personally I find the artwork of David Hockney childish and amateurish and a bit crap but that does not mean I do not respect the views and opinions of those who like and even love his artwork.
One man's meat is another man's poison and all that.
Have we become so thin skinned that even the most mildest of criticism is now an automatic affront?
For what it's worth I am a huge fan of Ezquerra (as it is his artwork that is being discussed, not Bolland's) but the cover of Case Files 5 (US) does not represent his artwork, blown up out of all proportion as it is.
Sorry for any consternation caused to Ezquerra, his family, friends, and fans but that's my opinion.