It's important to contextualize statements. In the linked image, Radioactive Man is claiming that he became a reservoir of infinite radiation, meaning he has an infinite pool of radiation to draw on, not that he can pour out radiation with a literal infinite amount of grays. There needs to be further context of how much of his reservoir/how many grays used when he fought Thor.
This is simply radiation range. Unless you can specify what "effecting literal dimensions" means and unless you can quantify how many grays of radiation that would grant, this is unusable.
Similar to the first thing, you're failing to contextualize this statement. The radiation levels aren't literally immeasurable, they just exceed the sensor that picks up the radiation, as shown by them literally looking at a piece of machinery to see how much radiation is being measured. The most common device used to measure radiation in military settings are geiger counters, which can only really measure up to 100,000 msv/h, or around 0.1 grays. For reference, Garou passively radiates around 100 grays, and at his peak radiates over 80 billion grays.
This is unquantifiable.
Unfortunately for Thor, his immortal molecules wouldn't allow him to resist Garou's radiation. His matter manipulation is on an atomic level, tearing apart sub-atomic particles, which as a result would also tear apart his molecules, making his resistance to radiation useless.
After doing some research, I honestly don't see how Thor wins here. Once he's hit by any of Garou's matter manipulation attacks (which he spams), Thor would start to get incinerated by Garou's radiation. If somehow, he avoids getting hit by these attacks (which as a result cause explosions as large as moons), Garou would simply grow far faster and stronger than Thor can keep up with. Thor's stoppage of time at that point would be useless considering he wouldn't even be able to damage Garou, and his soul damaging abilities also wouldn't do much to Garou considering his
soul has been brought to near-death countless times, and he was able to practically revive himself via sheer willpower.