1) I am not familiar with the crossroads of infinity being connected to hyperspace, but even the Invisible Woman has been portrayed as capable of taking them out.
Plot-Induced Stupidity goes both ways. You cannot ignore the low illogical showings and justify the high illogical showings af the same time. We have to find a more consistent power level that makes some semblance of sense.
2) Odin inconvenienced the Celestials during their introduction story. It is what originally defined them. It is not PIS.
3) Galactus only needed to eat a few planets, and Tom DeFalco who wrote the Watcher-Celestial war story was Marvel's editor-in-chief for several years, and deeply committed to keeping Marvel lore reasonably coherent. You cannot easily dismiss this.
4) The cosmic cubes have also been portrayed as stronger than Galactus at times, who is usually roughly equal to Celestials.
5) I want to see the guidebooks stating that Franklin Richards can destroy the multiverse. In addition, the modern versions have been written by interns who are only peripherally involved in the running of Marvel as a whole, which has lead to quite a lot of inconsistencies. The classic 1980s ones were mostly very thoroughly researched and thought out though.
6) I do not understand your point.
7) Your current actions would instigate a scaling nightmare of every single cosmic entity or high level deity ending up at High 1-B, due to certain Marvel writers, especially the current ones, either having no idea what they are doing or not caring in the slightest of all the incoherent damage they cause to the story structure of the setting. And then you come along and take all of it completely literally, even though there is currently very little logical coherence between the stories, and it would be far wiser to find some sort of average and rational power level for the universal cosmic entities.
8) I am not a "debater", and have come to loathe that pretentious term, as it implies that all we should care about is scoring some kind of points against each other. I am a wiki organiser who has a responsibility to ensure that our statistics are reasonably reliable, and not completely bloated and exaggerated. You have consistently been fanatically pushing for the opposite, and I would still greatly appreciate if you finally let it go. Thank you.