Hi OP,
I can understand your point of view and hope you can find something new in the game to entertain you or at the very least keep circling back to check on the game every alpha release. Although the wait can be excruciating, I hope you find it worth it when it does arrive.
I myself started with 7d2d around alpha 6. I often have looked back through the years to see what has kept me coming back for more.
1st and foremost, there is still no other game out on the market that does a better voxel/RPG/Survival/Builder/TD game.
The ability to create your own POIs/worlds/mods to play has been the most important feature to me and has easily consumed more than 50% of my 2000+ game hours.
If you haven't looked into any of these activities, you should as it can help with the wait.
Lastly, 7d2d development is very much all about the journey and not the destination. Every Alpha brings a host of new changes which challenges players to see if they have the ability to adapt and survive as long as possible again.
*Cough* (Does best Mamdole impersonation) "A20 will be the best alpha yet..."