Episode I was a crazy time for a Star Wars (or even movie) fan. A lot of people wrote Episode I off as 'necessary buildup' for the upcoming epic 2 & 3. After those two movies ended up being shit I think people looked back on Episode I with a lot of cringe.
I still don't think Ep I is nearly as bad as people make it out to be. There's a ton of stuff that's just god awful but ya know what? There's a shit ton to love too. I don't think it's a great movie by any stretch of the imagination but it's not a catastrophe either. That denomination would go to Ep II for me.