The problem w/ CTF on Ragnarok isn't the map, it's the players. Not enough people in CTF actually play the objective, offense or defense. Like you said in your follow-up, it's just idiots DMR sniping with camo. If everyone is really into it and play the objective, Rag is definitely one of the better designed maps for CTF. Multiple ways into and out of bases, getting to and back from bases,
Also, the mantis is a fun vehicle. Though, people don't tend to use it right. They either Rambo it and die on the hill, or they ignore it and it sits unused. Personally I use the Mantis for Flag D when I get it. Seems to work great. If I got the medal for it, my only Perfections were probably Mantis Flag D, actually.