come apart at seams

freak out go crazy

become demented become psychotic blow a fuse collapse decline derange deteriorate fail flip out go bonkers go nuts go off deep end go off rocker go out of mind go to pieces have breakdown sicken

be calm

descend disintegrate lapse lessen regress revert worsen

backslide corrode corrupt decline decrease deprave retrogress return rot sink slip vitiate

die on vine disimprove fall off go downhill go to pieces go to the dogs

develop grow increase progress

aid build help improve rise