Nicola Coughlan is “bored by the lack of nuance” on Twitter. The 35-year-old actress – who is best known for playing Penelope Featherington in ‘Bridgerton’ – has stepped back from the micro-blogging platform in a bid to protect her mental health. She said: “When you become a known person, you’re like the weird teacher saying, ‘I’m still in on the joke!’ And they go: ‘You’re not any more. Actually, all this stuff is wrong with you.’ Most people are not trying to be cruel, and I would hate to completely shut down that dialogue. But your mental health has to come first.” Nicola previously took to…