Good Car to drive having some issues

I am proud owner of the kia Sonet HTK plus petrol variant. I had driven around 2000 km and getting 18.3 km/ltrs. I generally drive at a speed of 70-80. Although i am quite satisfied with my car but I had noticed few issues that i want to highlight. 1. The quality of plastics just below the windscreen is of poor quality and its lock become non-functional is just two months. And this issue is with every Kia car. Kia needs to work on it. 2. There is some issue with reverse gear and out of 10 times, it stuck somewhere. 3. While driving on the highway at a speed of 80-90, the tyre sound is quite noticeable in the cabin, which i didn't like. Kia needs to use some other brand tyre. 4. Spare wheel tyre size is smaller. The cost-cutting practice uses by all company. 5. All five tyres are not of the same brand.