Ellie was only joking when she flipped the Bird the bird! She wasn't really mad
Yeah, I think she was mad, she even said in the diary room she was "fuming"and that was a look of anger on her face not amusement.
Laura has behaved very immaturely, needy, demanding, and I suspect bullying. The other contestants all have been making reference to her constantly "kicking off".
She's also been very immature about sex, taking about the size of wes's penis and his moves. No one else is going to that level of detail. If a 29 year old man ( who looked much older) was with a 20 year old girl in there and doing the same, throwing hissy fits, being demanding, describing her breasts etc to thr lads, there would be a national outcry. Just because Laura is female, doesn't make her behaviour ok.
The rejection of her by the rest of the villa tells us either she is very unpopular or they don't like her behaviour in the relationship. From the comments we've seen it seems it's the latter.