Ha! Yeah, I'm anti nandros, not for the results, which I love, but the suppression, which is a bitch.
(And the whole joint thing is overrated IMO)
To a lot of young guys who want to do a cycle now and then to boost their progress, you don't want to fuck up your HPTA to the point where you do permanent damage. To the older guys, whose HPTA is even less stable and may be doing well on HRT, nandros can throw the whole thing off.
So it isn;t that Deca is so bad, but that it's such a dick killer. Of course, if you're always on, and always have test, and accept that's the way it's going to be, then nandros are no worse than anything else and Deca may actually be less severe.