They bothered me so much more in ME1. At least in DAI they were interesting visually. In ME1 you just had a bunch of stupid mountains and basically identical looking barren rock. Yeah, yeah, I get that space is mostly identical barren rock, but there's a reason that our goal of exploring such inhospitable barren rocks is probes, not people. And we the fiction of alien worlds is alien life, not "the moon, but a different colour, with more mountain".
I think they bothered me more in DAI because they were, relatively speaking, a much bigger part of the game. The UNC stuff in Mass Effect was more of a diversion from the hub areas/mission planets, which functioned pretty much as they had in every BioWare game since KotOR--big(ish) area with one central plot thread and a bunch of side-quests. You could ignore the UNC worlds much more easily than you could the open world areas in DAI, and if you did decide to explore them, they didn't take nearly as long to get around/be done with.
In DA: I, those mission planets/hub areas didn't really exist beyond, like, Skyhold, so the UNC-esque open areas were where you ended up spending most of your time.
I actually recently went straight from a playthough of DA: I to a playthrough of ME1, so I spent a decent amount of time thinking about why I found the UNC stuff so much more tolerable than DA: I's open world slog. Neither's a strong point of its respective game, to be sure, but ME gets away with it - for me, at least - where DA: I doesn't just because the UNC is a much smaller part of the overall experience.