>>23578613
Speaking purely for myself. As a literal 12 year old kid in 2004 when they were running it in the US, I just flat didn't like Kira. That was my primary problem as a kid. In retrospect, I kind of get it. Our protagonists up to that point had been Heero who set his own broken leg, Domon who was basically a martial arts super hero. The OVA leads who were mostly adults. Finally, we had Amuro whose series got interrupted by 9/11. At least we got to see him as an adult in CCA eventually though.
It was never the digipaint or the character designs. There's just something about the characters in seed, Kira particularly, that turned me off to the series.
From a macro perspective trying to figure out what went wrong for SEED, and assuming the obvious that everyone didn't have my problem. I think Gundam was already fucked in the US by that point. The most recent Gundam series to air in the USA was G unless you count SD Gundam Force. The initial wing boom was long over. The UC push got derailed after 9/11. 0083 (adult swim) and 0080 ( toonami midnight run) aired at night. We never made it to Zeta on TV. G got the franchise going for a bit, but bandai fucked that up with the G toy line horribly. Another factor worth mentioning, toonami went from a weekday block to a Saturday night block. Gundam TV series, before SEED, aired daily. SEED aired weekly. I don't know how much that hurt it, but I can generally assume it didn't help it. With the toy line fumbled after G and SEED being the first weekly Gundam in the US, I'm not sure if there was ever a real shot for it here.