I wish I still had my writeup on that last season, and especially the episode How Your Mother Met Me, which I think was a genuinely terrible episode that removed all depth from the Mother, and the only reason I think it got any praise was because of the ukalele rendition of La Vie En Rose at the end.

But yes, that entire season undid 8 years of character development for most of the characters, spent the entire season building up to the Barney & Robins wedding, which it then immediately undid, spent an entire season overdeveloping Barney to being a genuinely good person whose whole persona was a simple act of benevolent revenge...only to undo it and have him revert back to being a POS womanizer (until he knocks up some lady), gives us this big buildup for Tracy only to mention in passing that she died...like seriously it was about 7 seconds, and show Ted literally and figuratively letting go of Robin once and for all...only for him be like "oh yeah if was you i loved all along at the end.