thanks to @morgan_e_ and @recompilermag I now know that "broken" unicode is called "Zalgo" or "Z̖̉ͪ̆a̤̺̮̅̿ͧ̍ͣl͈͔̫̬̱̣̣g̗͎̬̞͖̈̒́ǒ͕̥̰͔̩̣͈" text