Earlier quoted context omitted.
You are correct. I am using an old browser. It does date from the present decade, however. It's not that old. I'm somewhat amused by the number of sites which fail to work properly (some at all) with it. Imgur is entirely dead. Reddit I can read, but moderation and reply buttons don't work. I hit the beta rollout of a news site last night (apparently part of their A/B test) and found that among the features which fai…
Why are you complaining? Web developers are not obligated to support people who chose to browse the web through a broken interface.
I've also found that the very rudimentary browsers included in cheap feature phones tend not to work particularly well with any measure of "modern" websites (though others do support these fairly well). While I don't suppose these are a large financial market, they're likely a large user market, as those phones are both cheap and exceptionally thrifty with battery life (weeks, not hours).
Given that this is graphical content, that's less a concern. But as I noted above: simply providing a fallback JPEG alt would have worked.
And noting an issue isn't the same as complaining. Actually, if you'll note, I fixed the problem, after a fashion, by providing a link to alternate and accessible content.
But thanks for your depth of understanding, empathy, and sympathy.