2016 Trump Admin is heavily populist, and his administration contains a lot of genuine political outsiders. People are very dis-satisfied, and genuinely excited about these "deplorables" shaking the establishment.
2024 Trump Admin is the establishment. Nearly textbook neocon, it's only innovation is its sophmoric conduct. To paraphrase Nietzsche... "if you drain the swamp too long, does not the swamp drain into you also?". Of course that assumes a draining attempt was made... regardless, it's populated almost entirely by those who were "never trumpers" during the first admin - including the Vice-President.
As for the man himself...I do not seem him as a deep or long term thinker. He's cleary attached himself to any vehicle which brings him to power. The idea that he planned and master-minded some "insurrection" in 2021 that was supposed to install him as a dictator, and his current Swamp Creature administration is somehow a continuation of that, just lacks credibility. It was a populist outburst of supporters of the first populist admin.Disillusioned protestors occupying a building is not a viable way to topple regimes (indeed it failed to do so in Hong Kong a few years earlier). These things do not work without institutional and military support, and the left trying to make this out to be a serious threat played a big part in their loss of credibility.
A final note - the famous picture of the Jan 6 guy with the painted face and viking horns? He is now staunchly against Trump. Remember Trump is an egotist and an opportunist, not an ideologue. He wouldn't know what to do with a coup if he tripped over it.