If your only insurance that Trump and his party will not attempt to illegally hold onto power one way or another is that they constantly lie and may have lied about doing that too, it provides me with little confidence.

You fall in the common liberal trap of putting too much faith in the strength of our institutions and democracy. The president is already quite literally above the law, Congress remains passive in the face of obvious unconstitutional acts and the supreme court is on board with it all. Why would they acknowledge the results of a losing election? If it wasn't for the (relative) moral integrity of Mike Pence last time, who knows what would have happened.

And if we do switch to democrats, then cool, I'll be happy to eat my hat and give you my five mea culpas. In the meantime, please don't shoot down any worry about the current distressing concentration of power :)