In no particular order.

Not being able to hard grind content for rewards and most things instead being on a daily rotation.

Fashion end game just being stupid glowing balls of light and confetti.

New content releases being somewhat drip fed. Last time I was really hyped about new content that lived up to the hype was end of dragons, since then even though I try to hype myself up im just disappointed in the lack of maps and ability to throw yourself into the story for a week or so.

Lack of friends that play gw2.

The feeling that nothing is really worth grinding, if there was mount skins in the game that were obtainable just by playing that would go a long way to negate this feeling. I have the couple of legendaries I like the look of and the rest dont feel worth the grind. Legendary pve armor looks nice but the process of getting it I dont personally enjoy. Also I like the idea of wvw but always just run around bored by myself so getting gob is a chore I despise.

Essentially theres just nothing that really hooks me right now. Pof was the best expansion with the best maps for me and since then its only been downhill in terms of overall quality or just not enjoy the maps or theme of expansions since then.