Pelea de Superman y Thor
While you at least have the good sense to back that up with a proper argument, there are still few things more annoying or insufferable than being told by people backing the character I don't back that I'm "underestimating them". Among other things, the argument is reversible. I can just as easily say that the person making that argument gives their favorite too MUCH credit. In this case, there is actual evidence and feats to back up the assertion, which is appreciated, but even so, that go-to line is annoying and not something I ever like to see.
But for my part, I can speak to how Billy has fended off attacks from multiple members of the Justice League, taken hits from Wonder Woman in that same encounter, and contending with heavy-hitters Superman and Black Adam. Now, concerning your listed showings, Red Hulk is a poor example to use because of how ridiculously inconsistent that character is (fighting Watchers for one, which is nonsense). The rest is overall legitimate, barring the physically destroying stars and planets feats, which to me seem inconsistent. Also of note is how Thor once needed the Hulk's help to perform a strength feat inferior to many of the ones described above. To put it simply, Thor is inconsistent in general, or at least he's seemed that way to me for some time. There's enough showings listed above of comparable impressiveness to suggest consistency and thus legitimacy though. Again, they seem to be by and large valid.
Speed is another thing one ought to consider. Thor's combat speed is in the supersonic range, and Billy's being able to (again) fight Superman is proof enough of superior speed. Of course, in total fairness, all of my given feats are pertaining to New Earth Shazam/Captain Marvel. If we use the New 52 version (or Prime Earth), then I'd agree Thor wins simply because Prime Earth Billy has not yet done enough. Going by the picture, the versions being used are Prime Earth Shazam and what looks like MCU Thor, who's pathetic.
As of now, I'd probably phrase it like this:
616 Thor at base power level Vs. New Earth Captain Marvel-Billy
King Thor Vs. New Earth Captain Marvel-Thor
Rune King Thor Vs. New Earth Captain Marvel-Thor
Any 616 Thor Vs. Prime Earth Captain Marvel/Shazam-Thor