horrendous, hateful, terribly, frightfully, abominable, direful, atrocious, dreadful, fearsome, horrific, more...

wonderful, excellent, marvelous, superb, fantastic

terrible, horrible, bad, dreadful, painful, disastrous, more...

bloody, continuous, vast, god, jolly, conscious, these

so bad,   just dreadful,   feel like shit,   really really bad,   "this is bad!",   feeling terrible,   that bad,   felt terrible,   feeling like shit,   feeling the worst