Source? in India Toyota is considered much more reliable vs Kia

That's been my understanding too. I do think the Korean companies have come a long way in their journeys but the cars don't have resale value and age much worse than their Japanese competitors.

The most attractive parts are the features they pack into the car for a fraction of the cost. The compromises are usually made where it's not immediately visible and for someone who changes his car in less than 5 years, I don't think it's an issue.

A lot of things are "considered" in the car fanboy circles (like german cars being considered more reliable in Europe)... and aren't true when you look at the numbers. Easy to find sources too.

Yes they do, it’s reflected in the retail and also used prices of Korean vs Japanese vehicles. Go compare any two similar Hyundai and Toyota, the Toyota will retain its value longer than the Korean cars because they’re more reliable and last longer. If what you were saying is true, the used values would be comparable, but they aren’t.