I could tell Abi was a bitch before she did or said anything overt behind everyone's backs. For me, it seemed like Abi did not like the other female fish from the get go, and her interactions with them felt very forced and insincere, even when Trish was being friendly and scheming along with her, it felt like Abi did not like Trish at all. Taylor kind of came off as not liking the other female fish too, but tbh I think that was mostly due to her being glued to TJ's side most of the time.
Taylor's crazy in a different way from Abi, where Taylor comes off as selfish and someone that just wants to have fun and get drunk, Abi comes off as the type of woman who says she avoids drama but is somehow always involved in it. She acts exactly like the type of woman that says "I only have guy friends, women just don't like me teehee!"