I have used Cinnamon with Wayland and it works but I use Kde Plasma always. Glad you didn’t give up. Kde Plasma is really getting a lot of updates and fixes.
6 months later, I finally stumbled on a proper solution that wasn’t “try another DE”.
Following the instructions from this post from a thread about a similar issue with Plasma fixed resuming from suspend with Cinnamon/X11 on my laptop.
Sharing this for visibility.
I must have posted this info around 50 times (mild exaggeration 
)