You fell in love with a game and it's characters, sunk hundreds, maybe even thousands of hours into it. It became a comforting, immensely satisfying part of your daily life. Then you heard a sequel was coming and got really hyped but when it came out it was utter rubbish...
Watched a recent video on magic and writing and it applies for scifi too. Every time you add to the lore you now have to remember and support it forever. 4 just added so much that they clearly didn't think through like that. Bungie dishes out lore in small bits from 1-3, and it was so exciting when you got just the small tiny bit of backstory. 4 and 5 then just dumped in on your plate in healing portions.