You are also unhappy that you can’t get a response from the first author [initially I read their Google scholar as indicating they’d left the field, but they haven’t and that was my mistake reading Google Scholar in Korean.] Meanwhile you have not contacted the third (typically senior and advisory) author, who appears to have publications as of 2022?
Yet even if you do the basic legwork here and contact all the authors, I’m not sure quite what result you want from this? I presume you’d like an acknowledgement that an old paper has errors? You’ve already received that through the acceptance of your own paper. Would an admission by the third author help? Do you demand a retraction of that ancient paper and every single paper that cited it since? And how is this the devastating critique of all science that you seem to think it is?
My link was just one example. As I indicated, I don't have time to give more examples, and I didn't expect to convince you. I think few academics are actively looking for errors, so unless you are, you may not notice them as often as I have.
> I can only assume that very few people were relying on this stupid model, since the flaw wasn’t noticed for decades.
There are quite a few papers that directly use the criticized model, from the 90s until recently. It does seem that many people blindly accepted a clearly wrong model. With that being said, the other model in the paper is responsible for most of the citations.
> You are also unhappy that you can’t get a response from the first author [...] I’m not sure quite what result you want from this?
The first author is the senior author here. (The conference paper version does not have the other two authors.) I contacted them because if I'm wrong, I wanted them to tell me how so that I could avoid making a fool of myself in my paper. I don't want their paper to be retracted, though a notice that it has severe errors would be helpful to readers.
The most effective thing I can do is encourage you to find problems in published papers yourself.
Another factor in my reluctance is that explaining each case would take a significant amount of time. (Brandolini's law, basically.) I can point you to places where I already explained problems I've found, for example: https://pubpeer.com/publications/95455FA4147A9CBD5EAA5185D21...
That paper has over 300 forward citations over about 25 years. It was published first in a conference, and later in the top specialized journal in my sub-field. I went through a large fraction of the forward citations and could not find anyone who noticed the major error I point out. And it's not difficult to spot if one does basic spot checks.