Acela Cars Aging Badly?

I’m on an Acela train right now, and it’s not the smooth, quiet ride I’m used to. Instead there’s quite a racket of shaking, squeaking, and creaking going on in here. It makes me wonder: were the Acela cars not built very well? Or is Amtrak not maintaining them well? No matter the cause, it’s a shame. I wish Congress would stop being stupid and actually fund Amtrak in a serious way – the $1 billion plan that was recently approved is a paltry amount, compared to what it should be, and doesn’t even actually allocate the funds.