Samsung has been a malicious bad actor for a while now. It's not just phones; they also pulled shit like retroactively adding ads to people's smart TVs etc.
(Also, even their "dumb" products, like appliances, are designed to fail just outside warranty. If you don't believe me, take a look at my washer's spider arm, which failed catastrophically due to corrosion even though nothing else in the machine had so much of a speck of corrosion on it. Samsung is clearly capable of specifying corrosion-resistant materials and chose not to on purpose in order to create a failure point.)
Your corrosion issue is due to dissimilar metals which, when in contact with one another, begin corroding immediately. They chose those materials knowing full well what would happen.
Their appliances are absolute garbage and I've read that many repair places refuse to work on them because they're built so poorly.
Being an Apple fanboy is up to you, but I have to say that Apple and Samsung are not the only options. Android has many manufacturers with their own spin on things. Samsung's spin happens to suck
Two of Samsung fridges were busted even with 10-year warranty, with mine coming first before my uncle's. I don't have fridge anymore as my food is stored in my uncle's new Samsung fridge. Also, he has a Samsung Smart TV, Tizen sucks anyway, he should get an Android TV instead.
And also, Samsung is already losing it's mid-range segment to Chinese OEMs.
and you might think their TVs would be ok, but search for "Samsung TV vertical shadow" or some variant and find endless results for failed LED strips or power supplies. trash.
So does that washing machine still work, or is that spider arm critical to all useful functionality? Anyways, one part getting way more corrosion than the rest is suspicious design.
The spider arm doesn't do much: it just attaches the washing drum to the drive spindle so that it can spin to wash clothes. If you're using the "let your dirty clothes sit still in a heap while the machine makes loud noises caused by the broken remains of the arm whacking and grinding against each other" setting, you don't need it at all!