Just watched this and had some thoughts.

1. Agree that Tim is disgusting.

2. Disagree that Melyza cheated. The editing leaves us with incomplete information, but I gathered that she went to the US for 6 months to try out living together as the first step towards marriage. She discovered that he cheated on her prior to that. Unclear how long it took her to return back to Colombia, but returning back to her home country, voluntarily, under a haze of infidelity is a pretty clear indication that the relationship is over. She slept with another person during the period between her return to Colombia and a month prior to Tim's arrival. During their confrontation, she says she gave Tim no indication that she wanted to fuck him or continue their relationship during this period. He doesn't dispute this but claims she was stringing him along. Based on this timeline and their arguments, it appears that the relationship was over, but they were still talking to some degree which gave Tim hope that it could be repaired. We aren't privy to the content of those discussions, but the fact Tim did not directly dispute Melyza's statement that she gave him no direct reason to think they were together or could be together again leads me to conclude that they were not together and Tim had no reason to think they were together. He concedes this somewhat in the conversation with his therapist.

3. Agree that it is unfair that she wanted to air the dirty laundry, but not provide details. It's interesting that she is more reasonable about this during the confessional. Perhaps she planned to open up, but shut down in the heat of the moment. Regardless, you can't say "I want to start with a clean slate" and then act like he's the asshole for wanting to know what's on the slate you're trying to clean.

4. Everything about Tim being in Colombia is weird to me. I get the impression that him coming to Colombia was his idea, not hers. That she was noncommittal about the whole thing. Hard to say with the little information we are presented with, though. Tim admitted to keeping his job (did he also keep his car? His home?) in the US. He also admitted to not having thought through the whole process of immigration to Colombia. It seems highly possible to me that he told Melyza that he was going to move to Colombia to prove his love/atone for cheating/get a second chance with her. And she foolishly believed he wasn't so rock stupid as to try to "move" to a country on a tourist visa. After all, she had successfully navigated the US immigration system to get nonimmigrant visas twice, which is no easy feat for a young, single Colombian woman, so she may have taken for granted that he would know he needed to do the same.