Mmm not looking good.
Can see that 1 Mbps might have been possible, but you appear to have a fair few errors and the speedtest shows speeds are up and down a lot rather than being slow but steady.
At a guess AOL moved you from the BT Wholesale platform to their LLU platform when triggered the change.
With a 66dB attenuation the line is very long and even with the best combination of ISP and hardware probably only ever going to manage 1Meg to maybe 2 Meg.
1. Do you have a master socket, if so take the lower faceplate off which will disconnect your extensions and post the ADSL statistics when using that socket.
2. Log into the routers web interface and find the section called Modulation or ADSL mode and select ADSL (G.992.1), this may behave better than ADSL2 which you are using now. It may perform worse, very much a try it and see.
3. Consider trying different ADSL hardware, but you need to know your AOL ADSL username and password for them to work.
4. Change provider in the hope that different exchange hardware might perform a bit kinder on your line.
If the problem is still the wiring in the street pretty much all of the above won't have much effect. Option (2) might have some effect.