Her messy beefs with ‘good girl’ celebrities proved no famous woman could escape scrutiny in the 2000s — Welcome to “How I Got Radicalized,” a new series at GEN that tells a story about a cultural moment — a TV show, commercial, character, song, book, musical, etc. — that made you drastically rethink how society works. Here’s how you can pitch us. “Baby, let me tell you, the…