@forfoxsakee
9-3 and you live with another person who does 13 hour shifts and leaves at half 6 in the morning and gets home at 9 at night that you take on most of the household stuff? E.g when the person comes home they should come home at night to a clean and tidy house, bathroom cleaned/kitchen cleaned/garden tidied and a meal cooked? There are no children in the home.
If my partner was out of the house from 06.30 to 21.00 then yes, I would have a meal waiting for them on their working days. But you didn't say they were partner, just that you live with them; I would not do that for a flatmate.
"Clean and tidy house"? Every adult tidies up after themselves, but yes I would do the day-to-day cleaning. The deeper stuff I would still expect to share on your three non-working days. And if the living room is strewn with your belongings, they'd be left for you to deal with as you wished.
"Bathroom cleaned/kitchen cleaned/garden tidied"? Bathroom and kitchen would be tidy and under control, but not hotel-level clean - that would be shared.
And are you kidding with the 'garden tidied'? If you are out of the house those hours, are you even seeing the garden? Yes, if the garden is decorated with abandoned fridges I might take it upon myself to hire a skip, but filling said skip would be a joint enterprise on your 3 days off.
But, this seems to me to be the point of your thread:
"I still end up doing most of the housework which is why I'm wondering if I'm being taken for a ride or not."
If you're working 50 hours each week (plus 6 hours commuting) versus their 30 hours with no commute, then no, you should NOT be doing most of the housework - but you should still be doing a fair share. What constitutes a fair share should be talked out with your partner/flatmate (and their relationship to you will obviously affect that).