事儿b means that u are picky and fussy,not easy to get along with.

事儿比。因为b发音和比相近，所以可以说事儿B代替。形容这样的人:老是惹事生非，找麻烦，不得安宁，没事找事的傻比。就是事儿比。。。这是我的口头禅，哈哈哈

就是多管闲事

就是说你这个人很麻烦，不容易相处。

you sure 事儿 and B are used together? maybe it's just a label, like 事儿A, 事儿B, 事儿C.... or sometimes Chinese people use the letter B to express their dissatissfaction and anger in an unpolite way