That's just factually incorrect. Watergate took 2 years from the break in to Nixon's resignation, which was shortly after the smoking gun tape was released. This isn't a guarantee that we will find any smoking gun in this instance (though Trump Jr's emails are certainly incriminating) it is just showing that these things take time even when the party of interest is guilty as hell with recordings of their guilt.

We need (and Muller is providing) a deep impartial look into this which will take time. If he is exonerated I for one will be relived and happy to attack him for his terrible policy's. If he is guilty of what he is accused of we will literally be arguing the specifics of what constitutes treason, regardless of the outcome of that debate a POTUS should NOT be in a situation where you at best get off of treason charges based on technicalities.