When most frames get bent, generally, one front corner ends up sitting higher than the other. That can normally be straightened pretty effectively.
It’s really hard to tell from the pictures, but in this case, it almost looks like the entire corner “buckled” where the big issue is that one front corner is now sitting further back than the other. From what I can see in the pictures, I’d probably say this frame is done. But that’s just what I can guess from some pictures.
Being that it’s an older chassis, some would argue that the frame should be “done” anyways.