The phrase "particular bugbear" refers to something that annoys or bothers a person in a specific way. It is used to describe an issue or problem that is especially irritating or troublesome to someone. Full definition
It's a particular bugbear of mine, that the small folk in our lives, are constantly the victims of the sleep debate. (phdinparenting.com)
Foreign policy is a particular bugbear for anti-war Mr Corbyn, following the rows over intervention in Syria which 66 Labour MPs voted for. (politicshome.com)
Covering too many bases is a particular bugbear of Ben England. (bbc.co.uk)