It actually isn't that incomparable between Iraq and this war.I am engaging with the actual point that some people (not naming names) on this thread have been posting inflammatory propaganda since day 1. Or others making unreasonable comparisons such as comparing Russian military capabilities (whose GDP is only equivalent of Guangdong) to hyperpower US invading Iraq just to deflect realistic critiques to biased OSINT analysis.
US went vs 500 000 troops with 480 000+, but those 500 000 had a very questionable command structure as well. And this was after months of terror bombing meant to force civilians to leave and to weaken Saddam's ability to call on conscripts.
If US had invaded with a mere 100 000 (proportional to how many troops Russia used) then it is quite likely they would be stalemated at best. Especially if they didn't do any terror bombing before hand and Saddam had international support. Iraq war was US beating up on its own crony, like Russia's chechnya adventure. Major powers were not interested in sanctioning America or giving weapons to Iraq. Because America was just killing "their own" dictator who they installed in the first place. Iraq was seen by Beijing as almost an internal affairs conflict for USA.