While the art was on point and the writing was okay, Origins was designed around microtransactions. It’s not really a game, it’s a monetization scheme. Unity is a massive fetch quest like all AC games and it has worse mission mechanics than the new ones. Good parkour doesn’t hide all of its flaws. If you liked Unity, it’s strange that you wouldn’t like any of the others going forward.
They used a Valhalla DLC to make Mirage and it didn’t sell as well as their others. IGN has it tenth, there are only 13 mainline games if I’m not mistaken and it maxed out only around 7k player peak on Steam. The “engagement numbers” out there are fake. This shows that people didn’t really want a return to form DLC.
Some people get bored and some don’t. Some people like the copy-paste style and some people don’t. Some people like fetch questing and some people don’t. But a lot of people don’t like UBI turning their SP games into live-services. The problems with AC games are the monetization schemes.