The biggest reason why the recoveries have been weaker is because the people who actually spend money to drive our economy weren't the people who were actually getting enough money to do it. That problem started in the 80s. In that time people could use the equity in their homes as their ATMs to keep spending but even that wasn't enough. By the time Clinton was elected in 1992 the economy was on the verge of collapse. Which was the reason for "It's The Economy Stupid" was born.
The middle class and poor have not had a proper increase in wages since the 80s. The federal minimum wage has not been raised since the bush boy years. The only way some states have higher minimum wages is because the people voted for it by the ballot box.
While the wages, salaries, benefits and unearned income for those at the top increased and have continued to increase since the 80s while everyone else has stagnated.
It's gotten so bad that we now have people who work but still qualify for pubic assistance.
I believe the biggest factor in why recoveries are more and more sluggish is because of the massive state, federal, and corporate debt overhang.
The federal debt is by far the biggest threat to the future of our Republic. So when a dipshit howls "MAGA!" and then proceeds to double the deficit and spend more money than even Obama did, I figure we're all fucked.