I think you're way off base. It's called rosy retrospection, https://en.wikipedia.org/wiki/Rosy_retrospection. As you already mentioned in your comments, you're judging the past disproportionately more positive that the present.
If you really want to know if everything is declining, try measure it everyday for the next five years. For example, every day, rate your personal well being, track how (un)happy you are with the current software, how much you pay to your landlords and subscriptions, how many mistakes the police makes, the weather, everything, ... After 5 years you'll have a good idea if things actually got worse than they are now. Sure, some things will get worse, but definitely not everything, and some things will even be better than they are now.
If you really want to know if everything is declining, try measure it everyday for the next five years. For example, every day, rate your personal well being, track how (un)happy you are with the current software, how much you pay to your landlords and subscriptions, how many mistakes the police makes, the weather, everything, ... After 5 years you'll have a good idea if things actually got worse than they are now. Sure, some things will get worse, but definitely not everything, and some things will even be better than they are now.