From one of the Liam Payne subreddit -
Ruth is surely calling all of them out - Kate with her continuous posting about Liam, angel numbers and grief, Louis with Diary of CEO podcast and album promo around this time of the year, Louis and Zayn with their upcoming documentary about Liam etc...
They finally see oppertunistic Louis ass
Yes, I think Ruth probably does mean all of them - but only Louis is hitting the headlines every few days for talking about Liam, and only Louis has a single out right now which he desperately wants to do well.