Cars have never been more reliable and safer, however "better" is a woefully underspecified and subjective thing.

Things I don't like about modern cars: they all look the same, crappy capacitive controls and touchscreens inside the car, constant tracking mandated by law, much harder to work on the car if you are a car enthusiast.

To me, a classic car from the 80s, or even early 90s is a far nicer vehicle to be in and drive, and provides a far better subjective experience, both in and out of the car, so in a sense, modern cars are "worse" for me.