NHTSA Complaint #11517035 — 2020 HYUNDAI SONATA HYBRID

I noticed a strange smell almost like burning maple syrup in the garage for months. I thought it was just a different smell from Hybrid cars as I didn't have this used car very long. While driving at times the acceleration would stutter, again I thought this was just expected having never driven a hybrid car. Then on a trip a couple hours out of town someone stopped me on the road to tell me I was burning antifreeze and he could see white smoke coming from the car. I pulled over and didn't notice anything and continued driving but the heater wasn't working, it was blowing cool air despite the heat being on. I pulled into an auto parts store and got antifreeze in case. And then the overheating alert came on. I waited and filled it up and made an appointment at the dealer. They diagnosed it as a a blown gasket and a bad catalytic convertor and replaced all of that. After bringing it home I continued to lose coolant even with a two mile ride, I went from Max fill to half way between max and min. Clearly the problem wasn't the gasket or the catalytic convertor. Others have shared similar experiences online and had to have many parts replaced. The coolant tank, the EGR cooler (?), etc. I don't know what the problem is but something is wrong with these cars.