Dropping rates creates speculation of future economic growth that can make stocks go up and thus make the capital class happy their assets are accruing but it seems new business growth is fairly exclusively on the side of consumer demand pretty much this entire century. Increasing money supply isn't doing jack. If theres no money out there looking to buy goods and services you could be giving away money to banks with no meaningful economic benefit for it.
Europe has been in this kind of glut longer than the US has but its infecting the whole world - too few people have enough money to create the real demand that stimulates real economic growth. Theres only so many yachts a billionaire wants or so many summer homes a millionaire stakes. Wealth inequality is the driving force behind the slowdown and none of the forces that participate in shaping policy are aligned with the goal of fixing it.
Firstly, I totally agree with you on 2008 - bank failure driven recessions are always worse than regular recessions, so 2008 already takes a lead.
However, there is another aspect -- the 2008 crisis was controlled by a combination of controlling interest rates and other QE measures. We're now still in ZIRP (zero interest rate policy) so one of our key tools for combating a crisis is gone (it is like being at the bottom of the hill and realizing you are already on low gear.)
Of course, we have other QE as well as fiscal tools, but lowering rates wont be one of them.