Toyota is rightfully legendary for the durability of its designs. However, handling and interior comfort are two of the negatives frequently cited for Toyotas. Even the pricey Avalon has a bouncy, floaty ride at expressway speeds, thus proving that there are significant engineering compromises inherent in all car designs unless one wants to pay more than…perhaps $70,000. And even then, not everyone will be happy with a particular car model’s design in some manner or other.
But, anyway, you did get a very durable, reliable, economical car. So it will likely last far longer than your interest in it will last.
How does one find out about things like handling, ride quality, interior comfort, and other factors that might be important to that person? By reading every review available, by listening to advice from others, and by doing an extended test drive. Unfortunately, otterhere, you did none of these things. Hopefully you will learn from this hard lesson.
As to the “perfection” of the Suzuki Swift’s design, the marketplace’s reaction indicates otherwise. If this was such a perfect design, then why were so few of these cars sold in the US, despite their presence in both Suzuki showrooms and in GM showrooms under the GEO Metro guise?
What I am trying to indicate is that your values as they relate to cars may not be similar to many other consumers’ values, hence the need for you to take lots of time, to keep an open mind, to listen carefully to advice, and to take LONG test drives–on a variety of pavements–with any prospective car model.
Like the others, I suggest that you sell this car and move on. If you invest a few thousand $$ in upgrading the suspension, you may wind up with ride and handling characteristics that are no better, and may actually be worse. Even if the ride is improved, you would still be driving around in a car whose interior layout you consider to be very bad. What would you have gained, except to have sunk so much money into this car that you wind up having to keep it for an extended period of time, during which you would resent the car every time that you drove it.
Move on with a different car.