Yeah, Ransik fell short for me for those reasons. Too silly at times, his motivations were pretty weak, so hard to consider him a Magneto when he's not sympathetic, but really, the main problem was the writing in Time Force was VERY erratic. It was like there was a full team of writers who weren't working together and had poor oversight. And really, Power Rangers must be an absolute nightmare behind the camera, considering how its made from stock footage.
I think Time Force was one of my favorites of the Power Rangers (probably tied with Dino Thunder, and right behind Zeo and SPD) franchise. It was actually probably one of the easier ones for them to make, too, it follows the plot of Mirai Sentai Timeranger pretty closely. So it was probably just a matter of getting them into similar locations and hoping people ignored the fact that, once again, yellow was a dude.
It will probably bug me forever that Wes' power-up mode was magic based, though. Everything else in the series had a future-tech theme... and suddenly he's got magic. It felt out of place.
As for Ransik specifically, I think it's the lack of ability to sympathize with him that actually makes him better for the medium. You can't tell yourself that his victory won't effect characters you care about. With Magneto, no matter which side wins the end-result is peace, it's just the cost that he and Xavier disagree about. With Ransik it was just rhetoric to further his actual goals of power and revenge against a perceived enemy. There may have been a very real event or prejudice that had caused him to lash out in the first place, but in the end, even he wasn't trying to use it to justify how far he wanted to take his payback.
He felt a lot like Megatron in that respect. Only he lacked the charisma and strength of will to hold his army together all at once... since the excuse for not letting them all out at the same time was that he couldn't control them.
That's not to say he was... at all
... a better villain than Magneto. My personal opinion is that Magneto's probably the best that Marvel has, and certainly my favorite thing about the X-Men. Well... my favorite thing about the X-Men, right after Rogue.
>.> Unless Goth Rogue counts as a separate thing. Then it's Goth Rogue > Rogue > Magneto.