I love Linux, but I admit these are valid. I've had some of these same issues.

Sleep mode that doesn't work consistently,

I haven't had any issues with sleep on my devices, but I have in the recent past on previous hardware.

WiFi driver issues, printer driver issues, touchpad driver issues,

My WiFi doesn't work at all on my desktop. Though it's worked on a live image from another distro so seems likely to be an issue with the distro's distributed kernel, not a Linux one. I run a rolling release distro so won't be that the kernel is too old. But don't care so haven't troubleshot it much. My printer requires the use of vendor provided drivers, which are only available for some distros. It works, but not a solution I'm happy with. Never had touchpad issues.

several different wonky ways to install programs instead of just double-clicking an .exe and pressing "next-next-OK",

I think package repos > collecting and installing your software piecemeal from all over the place. But having to deal with repos, flatpaks, appimages, etc. can be daunting.

random shutdown of programs for no reason or error codes

Sounds like an OOM process kill maybe? That'll show in your kernel logs if so. But no immediate visual feedback.

...the list goes on. And on topnof that, all the stuff that people are used to using that just doesn't run on Linux at all.

If there's proprietary software that doesn't run on Linux that someone wants/needs to run and there aren't any viable alternatives then yeah, probably a non-starter. There's wine of course but it can be a crapshoot. No shade intended towards the project. It's amazing what it can do, even if it can't do everything.