It clearly is just gaslighting about democracy. Old Joe is the elected candidate for leader of the Democrats going into this election and they just tossed him on his ear and are undemocratically installing Kamala. She's already raising funds for her campaign. Who elected her as party leader?
The voters in the primaries. The way the system is set up, you vote for a candidate in the primaries and you have to trust his/her choice of a yet-unannounced running mate.
Remember Gerald Ford? People voted for Tricky Dicky in the primaries and then for him and Spiro Agnew in the general election. After Spiro quit, Nixon arbitrarily installed Ford as his VP so when Tricky himself was forced to quit, Ford became president without ever being elected.
Democracy? I guess everyone got to vote. Voting for Nixon or Biden in the primaries shouldn't mean electing Ford or the successor to whomever Harris might choose as a running mate though. This "democracy" is flawed.
Same holds true for Trump/Vance. When you vote for a geriatric candidate like Trump or Biden, you take your chances.
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I'm in my mid-70's but I'm still sharp enough to know I'm too old to be running a government.
I also question the motives of anyone over the age of 70 who would even want to try to run a government. It seems like power hunger is the chief driving force. Any normal person should welcome the chance to live happily ever after.