When did you buy Skyrim? I bought the game when it first came out. The game was notorious for being glitchy. Between 2011 and 2013, there were nine major patches to fix problems. And there are still glitches. These glitches weren't small. Some were quest breakers.
The ending is the last thing you remember about a story. If the ending is poorly written, it may leave the audience perplexed and frustrated. For Mass Effect 3, Bioware was forced to create an Extended Ending to assuage their loyal fans with a ending that makes sense. Reviewers have a job to critique the whole work, from beginning to end. If they chose not to review the ending, they are ignoring one-third of the story.
Here is an article on how to write an ending: