The game itself is superb. The quests, the writing, the characters are all truly top notch. The world is huge, the real Fallout ending is a welcome return...
But I'm still a little disappointed. I knew going into it that there would be bugs; with a company like Obsidian and one like Bethesda working on this, they're to be expected. And to be fair, I've only encountered a few bugs and all of them are easily fixed with one way or another... Yet I've heard a lot about bugs, and it's hard to not be disappointed that everyone else is not having as good a time as me.

The reason I voted for the last option is because I have this really weird game bug/glitch that makes my character unplayable after I finish the main quest. I've tried it several different ways but my character always ends up breaking. I don't understand what Obsidian did wrong but I'm sure they'll fix it in the next DLC/Patch.
That's not a bug or a glitch, that's fully intentional. It's meant to lend the ending gravitas. I guess you weren't observant enough to notice the huge unskippable text box that warned you about the final battle and how if you had anything else you wanted to do, you should do it
before accepting the quest.