I'm a fan of isekai stories, and I do think that this isekai was one of the most unique that I've ever seen. The art was gorgeous, the games showcased were diverse and intriguing, and the major characters were all fairly well-written.
But even with all that I can praise it for, I still couldn't come out of it enjoying it very much. It might be how much of a tease the ending was. It could be how toothless the whole thing was, since you always knew Sora and Shiro could never lose.
I'd be thrilled to see a season 2. Maybe that would retroactively make season 1 better, idk.
That, of course, is true for 99% of all works.
The fun is in HOW.
And for that NGNL gets Maid-chans highest praise for creativity. And for that creativity Maid-chan is also okay with ignoring a few logical holes.
I don't think that's necessarily true though. Even for other power fantasies like Overlord, they explicitly make it a huge point that if another player were to ever show up and become an enemy of Nazarick, they would be at risk of being completely demolished. In My Hero Academia, it's not impossible to see the heroes with their backs against the wall or even straight up lose sometimes.
The problem is that Sora and Shiro act as if there was nothing in the universe that could ever touch them.
Maid-chan thinks you are not really right on that.
Yes, they act that way all the time "If there is a chance to win, how small it may be, Blank never loses".
But first there is that "if", and second, they know they can lose but don't care (much). In one instance they even say it.
It is better to lose trying then never trying at all, Maid-chan would translate it.