Satellite internet sucks. The download speed is good but uplink can be glacial. So surfing the web is terrible. The overall bandwidth is 1.5 Mbps with 500 msec latency for Direct TV's internet service. That's why they try to bundle Direct TV with some other broadband ISP anywhere they can. If you live out in the boonies, you are screwed. Back when I had it, they would try to preload all your usual web sites into a local cache before you went online.
At least your 1.5 Mbps DSL would have much lower latency, so web surfing would be reasonable.