I've got a 2014 1.4tsi estate, owned from new, on a fairly low 95k km with original suspension parts and 17 inch wheels.
OEM tyres were Dunlop Sportsmaxx, pretty good and consistent through their 40k km life.
Replaced with Michelin Premacy which lasted near 50k km and for the last 10k km the ride felt as though it was deteriorating, so much so I thought a suspension component might be at issue.
A few weeks ago I fitted Continental tyres and the car's formerly excellent ride (imo) was restored.
Long story short, is that the tyres can make a substantial difference.
I run my tyres at 37psi, which is a bit higher than recommended, for various reasons:
safer emergency braking as the higher pressure allows the front tyres to resist load deformation.
don't have to worry about raising the pressures if you offer some larger friends a lift.
a little better fuel economy
I like the car's ride and handling characteristics at that pressure.
A very remote possibility for your experiencing such a poor ride is that the transport blocks were not removed on the, when new, pre-delivery inspection.
Most incidents of transport blocks in place that have been posted on Briskoda have obviously been with brand new cars, since the ride is reportedly near intolerable, but there has been at least one post concerning a second hand car.
To check, you jack up the front as if to change the front tyre so that the suspension droops, if that reveals some brightly coloured blocks on the suspension, then they need to be removed. Check both sides at the front, they would not have been fitted to the rear suspension.
As I say, it is extremely unlikely to have been undiscovered for so long, but it costs nothing to check other than a bit of time and effort.