I did a deca/dbol cycle once, inspired by the golden age bodybuilders of yore. Something like 600 deca/210 dbol (10mg 3x a day). Felt pretty good and looked great .. not so much in terms of muscle gains but there was zero bloat and my skin looked so good that even my mom commented on it.
…that is, until week 6 rolled around and I just felt like absolute doo-doo mentally. I think I even cried at work LOL. After that, went home and pinned some test and felt normal again after like 6 hours.
Testosterone is an essential hormone, used for all sorts of biological processes in the body, even beyond muscle growth & libido. I just dont think its smart to deprive your body of it. Hell, run 100mg/week if you want to do low test but zero test long term isnt a good idea