Don was way more at fault when it came to Betty, but holy crap did I hate Megan as soon as she began chasing her actress dream. I started off liking Megan. I understood why she was doing it. But I feel like she chased her dreams with absolutely no regard for Don. She drifted further and further apart from him and basically forced him to change his entire life just to accommodate hers. When he didn't do it, that was when they REALLY began falling apart. She was so childish and selfish. It made me sick to my stomach when he gave her a million dollars. Jesus Christ man, have a spine, don't let this silly girl completely walk all over you. Make her fight for it, she didn't really care about you. Megan was the exact opposite of Betty. I think when Don married her, he jumped from one extreme to another.