This is a really good fic and I didn't think it would be bad since you wrote it. But I have a few complaints. First of all, none of the Marvel Gods require faith like the DC Gods. The Marvel Gods are extra-dimensional beings worshiped by humans. They were seen as aliens for a while in the movies, but it was revealed that they were gods in the movies after Ragnorok. Anyway, in short, none of the Marvel Gods require faith and faith is not their weakness.
Secondly, MC exaggerates Rogue too much. Rogue cannot absorb the powers of the Phoenix Force, Thor, Odin and Loki. Let me give you a few examples. In the comics, the Phoenix Force was once split into five pieces and each piece had a different host. At that time, Rogue touched Magik, who had a piece of the Phoenix Force, to defeat her, but nothing happened to Magik. Or, she touched Loki once to absorb his power, but then she was stunned and passed out, and nothing happened to Loki. in short, rogue has an upper limit to the power it can absorb, and if it exceeds that limit, it either faints or dies. of course, in a non-canon what if series, it absorbed the power of the dead thor. but as a result of this absorption, there was no rogue anymore because its entire personality had turned into thor. in other words, there was now thor using rogue's body. odin said the following about this issue "i may have lost a son, but i gained a daughter".
third and lastly. mc's character development is little or no, and the focus is more on the character development of the other characters. the character development of the other characters is well-done, but the development of the main character is very much in the background. anyway, these are the things i don't like about this fic in general, but other than that, it's a very good fic. (translated)