Yes I played Renegade and it was pretty mediocre to me. Most of all I'm a fan of the C&C strategy games and their gameplay, then the C&C universe. Renegade was pretty average as a FPS game and I wouldn't play it if it wasn't for the C&C universe though. That's why I find it average.
I absolutely loved first C&C games and first two parts of Red Alert. Red Alert 1 is my favorite because it's the game that I grew up playing.
However in my book C&C 3 is still way higher than any Starcraft game just because I don't really like Starcraft, which was discussed already
I agree that EA kind of ruined the series but then I really liked C&C 3. I owned everyone online and imo it had amazing multiplayer. I suppose that we're looking for slightly different things. I'm not a fan of playing for the sake of extreme competition - to be faster, think about more things at the same time. I really love the slower pace of C&C. I like the fact that you build your "empire" strategically and if you're big enough you can crush your opponent who made some (often small) mistakes on his path. Then there's some politics, a huge map to explore and there has to be a significant difference between two players for really "owning" any of them. Meeting someone on your level makes on an extremely long and entertaining match full of awesome battles. Destroying an enemy one step at the time. In Starcraft each of these steps would mean destruction.
To me playing Starcraft is like playing CS except its more frustrating - you take your time building a base and soon after "headshot" and you're gone in a split second because your head was visible for a tiny moment. Also offline I find Starcraft boring and way more simple. Things that I enjoy about strategy games are reduced to the minimum in Starcraft.
To me C&C series resemble real life battles better. Making a small mistake will more often make you lose a battle, but not the whole war while having an impact nevertheless. But I'm the kind of guy who enjoys spending hours building my empire the best way possible.
Now I will admit that C&C 4 was one of the most ruined strategy games of all time. If EA would be able to forget entirely about C&C 4 and move back to that old slow base building/economy/strategy/enormous battles, nukes and bombing I know that this game will be for me, because that's what makes the C&C series for me. And I suppose that EA know that they made a mistake after reading basically any review of that game. It just sucked.
Oh and I loved Generals. To me Tiberium Wars was entirelly different. Starting from the world, story, moving on to the gameplay and graphics. The only thing that they share is a similar 3D engine. I played both games massively online so maybe that's why I don't see that much of resemblance. And I love the C&C series, to me they are the pinnacle of strategy gaming so that might also kind of affect my judgement