Take power in smaller portions, dissolve the institutions under you.

A strong-man avatar is actually an excellent weapon for eliminating government power. Support from other institutions can come from also rewarding other 'strong-man avatars' of other systems. Don't accept external institutional controls like corporate donations. Only work with individuals that others have to work through.

We need anti-parallel institutions based off of individualism and not collectivism and assembly. If you promote a libertarian approach to government, you'll effectively get individual avatars/weapons acting off of private interests to destroy public-sector institutional controls and methods. You also need to burn the system down underneath you and utterly replace it.

Every step of the way, promote individualism and your anti-parallel institutions. Make an effort to supplant and destroy previous institutions, and rig the public collectivist institutional systems against itself. For example, create mandatory sun-set clauses on all laws. Promote "reorganization through streamlining and reform" where you concentrate multiple bureaucracies into single bureaucracies, slashing the scope, cutting 80% of of the population, and cutting the budget. Use the budget cuts to then re-disseminate funds back to the tax payers as a "reallocation from government waste". Set laws that make the government constantly have to fight itself for any expanded jurisdiction.

If you really want to fuck the government system, end taxation. Promote full funding from either a for-profit government (given the assets it has), or through the purchasing of government bonds where the state is liable to it's investors. Again, sales only to individual constituents, not to everyone or abstract legal constructs.