I just found out that the server is not the problem. It is my computer that has the problems, or it might be just TTT. I play Prop Hunt and Murder yesterday, but it didn't lag what so ever. I really need help with this, so I can come back to Harpoon server and have fun. My Graphics and CPU (Processor) currently: AMD E-1 2100 1G with Radeon 8210 512 MB. I will upgrade later, but it might take at least 2-3 weeks. I usually get 20-40 Fps on average on Prop Hunt and Murder and other game modes. If anyone would like to help I will be really glad.
I did, I put my graphics all on low, Properties of Gmod to Direct X 8.1 (mine is 11 or 12) I went to my AMD Catalyst and also put Performance instead of Quality gaming, but it still has the lag. I play Battlefield 3 and Call of Duty just fine (with an average of 25-30 Fps).
Lol, I found the problem (most of it) my compatibility mode of Gmod was for Windows XP Service Pack 3 instead of Windows 8. Now it is running with 20fps.