My better judgement tells me to refrain, and I certainly don’t want to hurt anyones feeling or come off as a know it all or bully again. I have been down this rabbit hole before.
So in the spirit of answering your question as it pertains to my own experience (which may or may not apply to yours). My symptoms were like yours; tried several new thermostats, new fans, new water pumps (even high flow pumps), flushed motor and had radiator boiled out at a radiator shop, even installed a new radiator, tried different types and ratios of anti-freeze, even straight water yet no difference. I had resigned myself to drive it in cool weather only.
One cold winter morning I decided to take a little cruise in the cool weather, started it up and ran for about 30 seconds then suddenly started spewing smoke everywhere, it was a real James Bond moment. The exhaust smoke had this familiar smell to it, but I could not place it, for some reason I decided to look in the radiator and as I released the cap pressure came out, way too much pressure for 30 seconds. The ahhh moment when I remember what burning antifreeze smells like. Previous owner had doctored a leaking head gasket with stop leak, all the flushing I did finally made it let go.