Sorry, but the powers outlined in the US Constitution are superior to the Insurrection Act. Wishing it were not that way does not make it so.
The Insurrection Act does not place the Federal Judiciary or Legislature under the control of the Executive or stop them from functioning.
The Insurrection Act has been law since 1807 in one form or another, and that law replaced the earlier Calling Forth Act of 1792. It has never been declared unconstitutional by any court, and the legislature is unlikely to amend it presently to deprive POTUS of powers already granted. The Insurrection Act is about the powers of the Commander-In-Chief to address insurrectiona and deprivation of constitutional right. Should POTUS use that act to address deprivations of those rights and foreign interference in U.S. elections, it will be because state and federal courts have not addressed those issues by using excuses such as standing, lack of harm to voters, laches, etc. Note those courts haven’t ruled that the elections were all fair, just that for some techncial reason the court won’t address the obvious problem. POTUS doesn’t have to play dumb to what is happening too, and then those courts and legislatures will either act or look foolish.