The British have always had myriad words. My favorite:
'but seems to have become somewhat a howler when writing about molehills lately.'
absurdness, craziness, foolishness, inaneness, madness, senselessness, witlessness, buffoonery, monkeyshine(s), shenanigan(s), tomfoolery drivel, humbug, nonsense, twaddle blunder, bungle, flub, goof, howler
dotty, fey, loopy, off, potty [chiefly British], teched (or tetched), touched aberrant, delirious, delusional, delusionary, disordered, disturbed, neurotic, obsessive-compulsive, paranoiac (also paranoic), paranoid (also paranoidal), schizoid, schizophrenic, sociopathic, eccentric, odd, oddball, pixilated (also pixillated), queer, strange, foolish, senseless, witless, irrational, unreasonable, amok (or amuck), ape, ballistic, bananas, berserk, nuclear, distracted, distraught, frantic, frenzied, haywire, hysterical (also hysteric), raving, wigged-out
, fixated, monomaniac, monomaniacal, obsessed Phrases around the bend, off one's gourd, off one's head, off one's rocker, out of one's head (or mind), out to lunch [slang]
all from https://www.merriam-webster.com/thesaurus/senseless idiot and insane lol