I feel you in a big way, but to be totally fair: corporations becoming states has probably trended towards the better from a zoomed-out perspective, and political leaders lying all the time has probably only become more visible than ever.
The entities that were doing all the colonialism for the past several hundred years have been private companies, and they did huge amounts of slavery and genocide. Blackwater is bad, but the East India Company was worse. This is not to say that things are good now, only that they aren’t like worse than they’ve ever been.
And I think the present day has a greater expectation of political leaders being accountable to the people they govern than most of history. Back in the days of monarchs and oligarchs, there was no mass media to tell everyone they were lying and no likely consequences for the liars even if there were.
Again, I empathize a huge amount with what you’ve said & I am also disappointed that the world we’ve created isn’t better than it is. I just personally think that the above two are trending in a more optimistic direction, even if they’re still objectively pretty bad.