Reddit is easy to access and provides a steady stream of diversions that are just a click away. I think for some this becomes too much and they need to find a means to break the cycle of "This task I need to do is hard, I'll Reddit instead, that's easy and rewarding".
I've had to take a break from Reddit in the past because I was becoming disappointed in how I used my free-time. I never got further on any of my projects or hobbies—I just browsed Reddit on my phone.
When I'm at work I try to limit my Reddit consumption to mostly text-based or programming related subs. This way I don't endlessly fill my mind with memes, fun pictures, comics, etc and my browsing doesn't go from beneficial-diversion to procrastination-catalyst.