Evil Genius 2. I loved Evil Genius 1 as a kid. It was far from perfect and had a lot of bugs, but it was a blast. I'm fully aware there's a lot of rose tinted goggles going on for it in my mind. But I thought the new one would fix problems and be more enjoyable. It did improve on the first in a lot of ways, but it was so so grindy.
In EG1 you could send you minions into the world to steal money and complete missions (that gave points or loot, like stealing the Eifel Tower). I'm EG2, they kept this mechanic, but anyone you send to the world map is just gone. They cannot come back. This leads to just an annoying constant flow of recruiting more minions, training them to upgrade, and them being sent to the map forever to never return. It would perhaps be slightly better if you could increase the rate you recruit minions like the first game, but instead they always come at a constant rate and there is a button to recruit more but it's buried in a menu. So many things in this game are buried in a menu.
Another frustration, they added a feature to automatically tag enemy agents that come to your base (to be killed, captured, distracted, etc) but they're all under different research tiers. Why require the research at all? Right clicking agents and saying "tag for capture" is just pointless busy work. Even in the original you could hold control when you did it and it would flag the whole group. Not anymore. You can only tag one at a time.
There are just so many little things like this that made the game so annoying to play. I wanted to like it. But I just couldn't enjoy it. The new art style is worse, too. It keeps the spy fi aesthetic but it's much more cartoonish. The game is more diverse which is nice, the original was like all men. I also liked what they did with John Steele, the main antagonist more or less. Canonically you beat him and killed him but they pass on his mantle to new agents and train them to be like him. And they're relatively weak, but like a constant threat.