Well back in my 20's I was in a hell of a Depression and I struggled with showering ugh I once went almost 2 weeks, I was disgusting in myself..
I made myself a law 10 years ago when my life imploded and got my spiffy Bipolar badge
I will shower every single day no matter if I want to or not ( I know I have skipped a few days over the years if I was really sick with the flu or something) Often times my FIbro and PsA is so bad that the water hurts so damn much... But I still drag myself in the shower, I typically get wet quick , tilt the shower head the side , suds up and then rinse off. It takes at most 4-5 mins..
I will say I do not wash my hair in the shower, its not good to wash hair daily anyway, Mines almost to my waist. I wash it every 3-4 days or more if Im out getting sweaty or something.. But I wash that in the sink.
So by removing the hair washing in the shower it makes it possible for me to jump in and out daily. I also will add that I wash my hair, Wrap in a towel then twirl it on on top of my head with a clip and let it air dry, I am lucky I dont have to really " style my hair" so that helps too.
Maybe the dread of washing hair in the shower could be a bigger part of someones struggle too? Just a thought...