I toss and turn in a hammock but find it much more comfortable than a tent. My hammock, tarp, TQ, UQ, stakes, tie out lines and compression bag weight 7 lbs. I could get a lighter weight hammock and save a pound but I am a big guy and find the hammock I am using to be very comfortable so I am willing to carry a little extra weight for a good nights sleep.
If you have tried sleeping in a hammock and have not found it comfortable then it could be the wrong hammock for you and or the way you are trying to sleep in it. Most hammocks you sleep with your feet on one side and the head on the other side and hang the foot end a few inches higher than the head end.
Attend a group hammock hang in your area (tenters are always welcome) and you will be able to check out many different setups and find out the proper way to hang. I was at a group hang in SC 2 weekends ago and we had several first time hangers and I had extra gear that I brought so the new hangers could try some gear they have not had a chance to see or play with