HI!
You should use a brush before you comb. It won't pull any tangle as badly as a comb would.
Is the hair LONG? If so lift up a section and brush down the section under your hand. Then continue all around the dog. THEN comb through to smooth it all out.
The wiggly-ness should calm down with time. If he's a puppy, do short sessions. Be firm, because this should not be thought of as play. But treat or play between those sessions so he has something to look forward to AFTER his brushing.