

I’m sorry, that sucks. As cliche as it sounds, when I was stuck in a similar rut, the biggest positive influence was to try and go outside regularly. Even if it’s just walking through nature for a couple of minutes every other day, it really helped my energy levels and mood.
Stay strong! I hope you find something better.
(different person here)
I can’t give a satisfying explanation, but I can really recommend 3Blue1Brown on YT for great motivations for such things. He presents these topics in ways that make you want to understand them. I’m not sure which videos approach imaginary numbers - there might be standalone ones, but it definitely comes up in his explanation of the Fourier transformation.