Iraqi here!, I can confirm that people were optimistic of the invasion in the first 3 years or so in the hope that Americans would help iraq to re-establish itself thinking they would be a second Germany or Japan, then it all came crushing down with the civil war in 2006. Where America is now considered the evil that holds Iraq from moving in the right direction, and so began 20 years of destruction.
Edit: sorry for the typo.

https://www.gallup-international.com/survey-results-and-news/survey-result/shifts-in-iraqs-public-opinion-from-2003-to-2025

In 2004, shortly after the fall of the former regime, many Iraqis expressed optimism hopeful for a democratic transition, improved public services, and national recovery. However, this optimism began to erode by 2007, following the outbreak of sectarian violence in 2006 and the partial withdrawal of U.S. troops. Confidence plummeted, with only 45 % of Iraqis believing the country was on the right track.

Don't mistake the Iraq War being a clusterfuck that the US exploited under the Bush regime for ideological and corruption purposes with Saddam's regime being something that Iraqis were mourning to see go.