You're basing your opinion off older cars or a highly biased sample. Even Consumer Reports has a highly biased convenience sample of self-report data to rank reliability (which is a huge problem from a statistical standpoint).
Here's an example of the methodological issues with Consumer Reports ratings.
Let's look at Tesla for an example. They have
Tesla with a predicted reliability of 36, which is
one of the worst at 17/22.
However, Consumer Reports Tesla as having the lowest predicted maintenance and repair costs of any manufacturer over 10 years:
https://www.consumerreports.org/cars/car-maintenance/the-cost-of-car-ownership-a1854979198/
Some of the difference is simply the cost and nature of maintenance (no oil changes in a Tesla; luxury cars will typically have high maintenance costs even if reliable), but the inconsistency shows that something is off with their ratings of reliability. A car can have problems but be fixed under warranty for free, but the problem is that when they ask people to self-report problems they end up with one reliability rating. Then when they look at what people actually spend to maintain and fix their cars over time, they sometimes get a very different set of data.
Again, Consumer Reports ratings say Tesla cars are both unreliable and highly reliable, on average.
Back to Hyundai and Kia. For new cars with their reliability ratings, they put Kia and Hyundai on the high end of the middle (9 and 10 out of 22), however, Consumer Reports predicts Hyundai will have one of the lowest maintenance and repair costs with Kia in the middle over 10 years. That means their rating of Hyundai reliability is off but Kia matches up. Their ratings of Toyota also match up, but many other cars do not.
You can go on not liking Hyundai and Kia and not buying them but recognize that the reality of their reliability is much different than your anecdotal evidence. This is likely to be particularly true with EVs.
The good thing is that we have many options for cars to buy. I tend to stick with Toyota (my Prius has been great) for various reasons.