There were a couple of reasons why Taylor decided to call it quits. For starters, JP wasn't very talkative when they got out of pods. It was mostly Taylor doing all the talking and she wanted a partner who could balance the conversation out. It seemed that whatever chemistry they had between them in the pods had vanished.
Furthermore, JP made some seemingly unnecessary feelings about Taylor's appearance. He said that when he met her the first time, she had too much makeup on and looked "fake." He told her he preferred her when she didn't have any makeup on.
They got into a huge argument over this with Taylor taking offense and claiming that she should be able to put on makeup if she wants and JP claiming that she should be happy he doesn't like her all dolled up.
They spent a night apart to think it over. When they met up again, JP was still determined to try to make the relationship work. However, Taylor was done.
Watch Love Is Blind Season 5 on Netflix.