Most incompetent worker?

I had this coworker who doesn’t do jack shit in the morning shift (10am - 12nn).
Taking long breaks, like staying at cafeteria and chatting. Always on company IM talking about gossips. Reading manga online and shit.

I wouldn’t be complaining about that if this coworker can deliver. But no! Only has to do 1 module, it took almost a month for this person to finish. Always doing overtime without an ounce of progress. Siphoning the budget of the project. Everyone on our team were doing overtime trying to deliver function after function, modules after modules. Every other parts were finished except this person’s task. Took over it, done for a week. Told my project leader, transfer this person or you’ll see other core members leaving.
Person got transferred. Everyone felt like they had a massive load off their shoulder.