Who Is The Most Toxic Individual In Bachelor Nation?

"The Bachelor" hit TV airwaves in March 2002 and jump-started a whole wave of reality TV shows that focus on dating and relationships. It can't be denied that "The Bachelor" paved the way for the many, many shows that have followed. The original show continues to have a large, engaged fan base to this day and has spawned several popular spin-offs, including "The Bachelorette," "Bachelor in Paradise," "The Bachelor New Zealand," "The Bachelor Canada," and "The Bachelor Vietnam."

As one of the longest-running reality series on TV, it makes sense that, in the course of nearly 20 years, the show and its audience have seen a lot. From cast members that we genuinely adore to cast members that make it difficult to even want to turn the show on, the journey has been ... a lot.

Unfortunately, "The Bachelor" and its spin-offs have definitely endured more than one toxic contestant. Here are five of the most toxic cast members that Bachelor Nation has seen — so far.

Viewers were introduced to Luke Parker on the 15th season of "The Bachelorette" when he competed for Hannah Brown's heart. Viewers almost immediately didn't like Parker when he introduced himself to Brown by roaring at her, and things got more complicated for Parker's relationship with "Bachelorette" fans after he told Brown he was falling in love with her on their second date (via Marie Claire).

Things between Parker and Brown ended up in a showdown after Parker told Brown that he would 100 percent want to go home if she slept with any of the other men on the show. Brown sent Parker packing following a speech in which she stood up for herself and then some (via Distractify). We all later found out that Parker owes the producers of the show $100,000 after breaking the terms of his contract (via People). Ouch.

Another odd fact about Parker is that many of his fellow contestants also didn't like him. Cam Ayala later told Entertainment Tonight, "[He] was one of those guys I distanced myself from in the house... I just got a weird vibe from him."

Olivia Caridi was a contestant on Season 20 of "The Bachelor." She was a strong contender for the attention of Ben Higgins from the beginning, but things ultimately fell apart, with Caridi explaining to Bachelor Nation that she simply unraveled once Higgins began showing other women attention. "I think there was a time when I felt really confident, and then I could see him developing connections with other people," she said. "I could feel that the connection we had at the beginning was leaving, and that's when I self-destructed completely, because I was trying to find a way to make it happen when I knew it wasn't."

However, Caridi didn't make things easy for herself on the show. After insulting the other contestants because she felt they weren't as smart as her or because one was a mother (via Refinery29), Caridi definitely became the season's bad guy.

Years later, Caridi atoned for her actions and revealed how far she had grown since her season debuted. She also revealed that viewers were especially harsh toward her. "It took me so long to get over the whole thing. I was messed up for a long time after that," she said (via Refinery29). "I was suicidal. I've had depression my entire life. When the show was airing, I was getting messages saying I should kill myself, and, you know, you're not worthy of living."

If you or anyone you know is having suicidal thoughts, please call the National Suicide Prevention Lifeline​ at​ 1-800-273-TALK (8255)​.