But you are on shared spectrum - you and everyone else in the locality the same network are using the same bandwidth. If you want more bandwidth you can pay for it: if enough people do the same there is the economic incentive to install more masts, make the cells smaller and thus create more capacity.
But you don't want to do that: if you did you would have done so. Indeed, you explicitly state the motivation is to drop your DSL, presumably to save money.
If you're using what is effectively a community resource why should you be entitled to more than your fair share if you are not willing to pay for improving things to compensate for your additional use?
Mobile spectrum is always going to be finite and at a premium because of that. "Me wants and screw everyone else" does not alter that.
Biting the hand that feeds IT
