KIA really is so unreliable and rusty?

Hello, I want to buy a new car and fluctuate between an XCeed and a Mazda CX-30. My decision was actually in favour of the XCeed. I then did a little research and came across new horror reports again and again. For example, that already after 1-2 years rust spots were to be seen, or that the back seats started to rust under the fabric. The underbody is probably also insufficiently protected against rust. In addition, the double coupling gearbox should be And the electronics like to cause problems. To all the abundance, KIA is probably also happy to behave boldly as regards warranty cases. That’s enough, if you were a little late at the inspection. I would be interested in what you have done for experiences. Do you know such problems, or is everything okay with you? Greetings