You'd disagree, I trust?
You'll have a new president in 2028, be it Vance, Shapiro, or Oprah Winfrey. Either way, it won't be DJT.
Now, with additional concentration of power, that increases the possibility of a successful overturning (in favor of a new conservative candidate), or simply a biased election.
Dictatorships often have elections and are supposedly democratic. The question is whether those elections reflect the genuine, informed self-interest of the people.
And US elections have been very tight, and the electoral college means that only a few states being controlled is enough.
We also lack an apparatus to overturn a fraudulent election. Even if a judge rules that an election was fraudulent, that's not the same as certifying another vote total nor can it physically remove someone from office.
Remember when Trump said "we wouldn't have to vote ever again"? That was 3 months ago, so maybe your memory doesn't go that far.
That said, I also remember when Trump said he'd build a wall and that Mexico would pay for it. A remarkable amount of what Trump says isn't true, I think everyone's in agreement on that.
If the country is happy with the state of affairs in 2028 then I expect you'll have JD Vance as your president. If not, maybe Newsom, Buttigieg (my hope), or Shapiro. Either way, if you truly think that 2024 was the last election Americans will vote in, respectfully, I think you're a little bit deluded.
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 :)