This time he went too far! “I’m angry to the point of boiling over,” the host, 55, fumed on Good Morning Britain on March 8, the day after Meghan and Prince Harry’s big interview, noting that he didn’t believe a word of the tearful duchess’ claims of severe mental distress during her time as a working royal. The next day, he was the one getting emotional, storming off in a huff after a colleague suggested he was “trashing” Meghan, 39, because she “cut [him] off.” Hours later, amid more than 41,000 complaints about his comments — including one from Meghan herself in which she reportedly accused him of degrading the seriousness of mental health issues — Piers refused to apologize, choosing instead to quit. “Thanks for all the love, and…