It was easy to find people with the exact same problem as me, but getting the problem solved was often hopeless.
In some ways, community forums for such a highly obfuscated operating system are somewhat useless, because the answer is always "hopefully Apple notices this and fixes it."
“why would you want to do that?”
That was true for me, back when my 14-month-old iMac (I was relying on to make music) developed color streaks on both sides of the display. The forum told me I was one of hundreds of victims ... before that topic was erased. A 'fix' took a couple of years to be offered.