I've played Oblivion, Fallout 3, Skyrim, and Fallout 4, the latter two at launch. I've never installed mods for any of these games, and I rarely install mods in general. Skyrim had a rough launch, where it would crash for me frequently, but that problem was resolved within a few weeks, tops. They're all very playable, and I never felt like I needed mods to fix them, which is why they also sell well on consoles.
and the standard of the complete version of a game release costing 100 bucks before the industry still found an excuse to increase the usual price of 60 bucks up to 70
Inflation is a fact of life, and prices were going to increase somehow, especially since a lot of AAA games these days are recklessly large, including Bethesda games. There's a lot more at play with the way DLC works and the pricing around them than just trying to sneak a price increase by you, but the short answer is: I don't think it's a big deal to have an entry level price for a game and another price for the game and expansion content.