Clearly improvements in the things you mention can't happen overnight. But improving the availability of jobs and having the stock market going up instead of crashing are objectively better than the opposite.
The article you cite explains that the net loss of YoY wages was entirely due to inflation, and in nominal terms wages actually increased YoY, and it also cherry picks the "production and nonsupervisory" group of workers (inflation adjusted wages for all workers actually increased) -- so its somewhat dishonest to not clarify those aspects. Inflation adjustments are also a notoriously tricky business, and without delving into the details of what inflation metric was used, and if it was applied on a region-by-region basis, hair splitting over the effects of inflation on wages to drive a narrative around wage growth (when the direction is generally "upwards") seems wrong.
You seem to be looking for reasons to explain why the trajectory of the US economy is negative, but I'm afraid that the evidence is mounting that wage growth and job opportunities should be expected to improve over time going forward, absent some new financial crisis.
edit: Also worth mentioning: staring at medians around wages is, imho, missing an critical aspect to understanding the actual experience of participants in the economy: income mobility. There's evidence that upward mobility has been stable despite an increase in point-in-time income inequality [1]. The question we should be asking is if income inequality at a point-in-time is necessarily bad if participants in the economy have ample opportunity to move up to higher levels of income. I don't have the answer to this, but any arguments about wage growth or income inequality need to take into account mobility, and they almost never do.
https://www.npr.org/2014/01/23/265356290/study-upward-mobili...