The whining about Wayland an systemd is perfectly justified because unlike other open-source applications they are not chosen freely by the user.

For other open-source applications, if you do not like them you do not install them and you choose something else. There is no reason for any complaint.

On the other hand, you may have used some Linux distribution for a decade and then someone forces upon you systemd and/or Wayland, regardless whether you want them or not.

In such cases it is very reasonable to complain about this, because whoever has chosen systemd and Wayland now forces you to do a lot of unnecessary work, either by changing your workflow to accommodate them or by switching to another distribution, which also requires a new workflow.

I have not switched to either systemd or Wayland, because I have never seen anyone capable to explain even a single advantage of them over what I am using.

I have tested once systemd, by installing Arch and using it for a month, but I have found a bug so ugly that my opinion about the technical competence of the systemd designers has dropped so low that I have never tried it again.

I am using Gentoo, which unlike other distributions does not yet force the choices of the maintainers upon the users, so I can still choose to not use either systemd or Wayland. However, I am worried about the future because both of them continue to invade other software packages, so even without using the complete systemd you may need to use some parts extracted from it, because other traditional packages have been substituted with packages that depend somehow on systemd.

Eventually, it is likely that I would have to write myself replacements for those packages, to expel completely systemd, but I hate to do such unnecessary work when I was happy with the older packages, which worked perfectly fine and they needed no replacement.