Those statistics are pretty bad. But you probably can't do much about them. They reflect bad line conditions.
SNR margin (signal to noise ratio margin) measures how much the noise on the line can increase before it overwhelms the DSL signal. Higher is better, mid-30s is acceptable. Yours are in the teens/single digits. That's bad.
Line attenuation measures signal loss from the CO to you. Lower is better, again mid-30s is ok. Yours are in the 40s. That's bad.
So what can you do? If the inside wiring in your house is bad, you need to fix that, or work around it. How do you "work around it?" You install a separate dedicated line from the NID (network interface demarcation, the grey box on the wall where the phone line comes in: on the house side of that box, its your problem; on the street side of that box, its the phone company's problem) to the modem. You can also install a whole house splitter/filter at the source of that run and then you don't have to worry about all those dang pigtail filters behind every phone.
So how do you determine if your inside wiring is bad? You disconnect your modem at the wall jack and plug it directly into the test jack inside the NID (and this will mean moving your computer to that area to, or using a temporary long network cable). This will disconnect your inside wiring and all the phones for the duration of the test, but it will connect your DSL apparatus directly to the telephone network at the last point of the phone company's responsibility. If the modem statistics are still awful, then the problem is clearly in the line before it gets to your house. Only the phone company can repair that.
dw