Fiber is the best, of course. but it is very, very unlikely that fiber will be available anytime soon in existing homes, especially in rural areas.

3.3 mbps is not too bad. Cable Internet is all about sharing bandwidth: you share the available bandwidth with all others in your neigbhorhood who have cable Internet. It does not interfere with TV. So the more people that get (and use) cable Internet in your neighborhood, the more it'll slow down. Cable users usually experience variable connection speeds. from very fast (5 Gbit or more) to very slow (5 kBit or less).
A good cable provider will make sure that only a limited amount of customers will have to share a single connection. If they get more customers, they have another connection built.
Most cable providers only care about getting as much money out of their customers as possible, however. After all, a customer service department dedicated to waving off complaints is a lot cheaper than investing several millions in better infrastructure.

DSL has the advantage of having a dedicated line between your home and the DSLAM (DSL  Access Multiplier). And the connection from the DSLAM to the Internet backbone is very fast, capable of handling many simultaneous connections at full speed. The main advantage of DSL is the reliability and the constantness of the connection speed.

In the Netherlands, DSL is slightly more expensive than cable and usually slightly slower. Still it is far more popular, since its more constant and more reliable.

The pen is mightier than the sword. But if you literally want to have some impact, use a typewriter

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