From my personal experience, my Hyundai Sonata Plug-in is below average in reliability. Not only has it left me stranded twice on the road, but it's been in the shop for multiple expensive repairs. Thankfully, for the most part they have been covered under the 5 year warranty and 8 year emissions warranty, although I have shelled out over a thousand dollars in non-warranty covered repairs to the engine. Honestly, I don't trust the car to go long distances.
So from my experience, Hyundai has nothing to brag about.
If you believe Consumer Reports, they generally have given Hyundai/Kia EVs and average reliability score for cars that have been out a couple of years. The Tesla model 3 also gets and average reliability score.
Plus, I've always thought if Tesla makes such bad cars, why are they selling so many of them?