Learn the lesson from the UK, who did privatisation first* and have witnessed things much worse than the current state of German trains (which are still *excellent* in comparison, and I say that as one who moved from the UK to Germany in 2018).
* or "harder", to the extent that German rail privatisation never went as far as in the UK. I understand there's a constitutional requirement here in Germany for government majority ownership of the rail system — I wish it were so in the UK
And like, if one's model for maintaining a system depends on having a sensible government in power, _regardless of which particular political party you think is least competent_ you are going to have a rail system being run incompetently at least half the time. That's also what we got with "privatisation", of course; why would we expect any different?
The main joke (there have been many smaller ones) for the last ~ decade has been the Brighton-London route, and two decades ago my trains home from Aberystwyth were getting cancelled every time a few stops before the Birmingham, with people saying that was to avoid getting counted as late.
* https://www.alamy.com/one-of-posters-from-the-conservative-p...