lol, sucks when links don't work. I feel your pain. I would've loved to have read them too. I'll be happy to look through the respect thread when I have more time (kind of working at the moment, so only can spare a few minutes to glance and type).
It still doesn't change the fact that for one, this is not Mxy, this is EJ and his feats were not anywhere close to those levels. Second, even if EJ had that power, he didn't come close to using it, or showing any indication that he could use it to that extent. Third, these still don't counter the fact that Mxy has time and time again been thwarted by much weaker opponents, non of whom would have a chance against Thanos with the IG.
Unfortunately, when you get to these levels of power, it's really hard to judge who's more powerful than who. Mxy's style is much different than Thanos with the IG. Mxy has always been more for humor and fun, not to be taken too seriously. If he ever was, there would have been more stories involving bigger cosmic powers trying to stop him. Instead, you are left with him harassing Superman as entertainment...and losing. Thanos was considered a serious threat to the multiverse and in his short time with the IG took out everything that stood in his way and pretty much everything that could, tried and failed. Give him 30 years of writing with the IG and he'd easily have feats to match Mxy.
I still give it to Thanos.