While I didn't really dislike Lisa while she was in the house, this is exactly the same as last year, some people think certain housemates undergo some magical transformation and are such great people after coming out - suddenly they are very 'likeable'.
The truth is you just think they are better because you only get a version of them that they choose to present over social media, you don't have to watch them and their personality and if they are on video it's not long enough for their flaws to start showing again.
But if you find a way to speak to their friends, you find out they are still the same person, before the show, during the show and after it. Some can even stuff up and become annoying over social media as well.
'The house makes you do certain things and feel certain ways' is the new 'I was edited badly' that the show's psychologist tells them to say.