Sinema was a garbage fire, and her failure to even have a shot at winning an election where she's the incumbent should be a red flashing light to every Dem who believes victory can be found in acting like Republicans.
Some of the people I know in AZ have been unimpressed by her complete unwillingness to talk to constituents and provide basic constituent services. This only works if you are in a completely safe state and she is not in one.
Bernie Bros kept harassing her because she refused to bend the knee, and Ruben Gallego is desperately running to the center to have a snowballs chance in hell of winning, but keep going.
Reflexive groupthink adoration for someone who appears to champion your political needs doesn't always work out.
She was worlds better than the Republican though.
And you might ask yourself, how blue can a winning Democrat in Arizona be?
Please let's not insinuate her actions were motivated by winning elections. It was not some strategic move to the center to cater to the electorate. It was 100% corruption. She was literally bribed by special interests and promised a big reward when she leaves office.
Not enough reports about her entire career is as a ringer. The retconning of her by media and herself fools no one damaged by her lies.
Deliberate from day one.