The WFH dilemma has more swings and roundabouts than a fairground!
Pro
No commute = timesaver (to relevant to you OP)
No commute = cost saver (ditto)
No distractions = get more done
No need to get fully suited and booted/makeup etc = time and energy saver
Cons
Household expenses increases = heating, lighting 5 days a week
Commute = time and cost
Same environment every day = mental fatigue, monotony
Loss of informal conversations with colleagues= social aspects gone, plus productivity lost
Home becomes office = no work life boundaries (relevant to you OP).
Home becomes office = mess, office stuff in home space (ditto)
For me, I benefit from a 2 days in office and 3 days at home pattern (which some weeks is 3 days in office) - we have a home office so it's less encroaching on the rest of the house,
For someone in your situation OP you don't lose your wfh dysbenefits by doing half and half because your work stuff doesn't go away from your living room if some days a week, you go into work, you still have the problem and frustration on your home days, sounds like you'd be better off fully in office. Can you ask your employer for a (loosely worded) reasonable adjustments on mental health grounds. Several of us did that even during the height of the pandemic for welfare reasons and we were supported by our employer (Government Dept). We justified it by our improved availability and we were classed as key workers.
My worry this winter was the cost of heating etc but it looks like our bills aren't skyrocketing so far this winter. I really missed the routine of going into the office during the Pandemic, and stared to go back in regularly long before the Pandemic ended, as it was helpful to my mental health.
the most important thing is having the choice and freedom. Companies will only save money on running costs (heating lighting etc) if they literally close down their office 1 or 2 days a week so nobody goes in.