Albaba I think my DD wants to exercise some control of her environment. I have exactly the same issues:
Wanting out of the trolley and to walk. So I let her. I just have to factor a (much) longer trip to the shop than I'd normally do. Then engage her in 'finding the milk' etc and helping to put things in the basket. She hates being forced to be passive, so although it's more work to engage her in the activity and give her a little autonomy, it works. People do clock that she has a gait, but usually its the 'good on you girl' type looks she gets as she determinedly toddles round the shop. I consider that gait is showing the world what a determined little warrior I have
.
Oh goodness the whole toilet and hand washing extravaganza. Right with this one I chivvy along by making the next activity sound so blooming brilliant, I get her out the bathroom in a reasonable timescale. If the next activity could involve her making a decision or doing a (grown up) task for me, this is the most motivating! Carrying her out the toilet against her will is the worst thing I could do. I have to make her think it's her decision.
Yip, doesn't want to leave the ride. Either play the 'taking turns' card and encouraging her to let another (waiting) child to have a turn, or her to 'help' the next child onto the ride, or do the 'exciting next activity' talk, encouraging her to make her own decision to part from the ride. Again, meltdown if I just lift her away.
What doesn't work for us are: not allowing her to exercise personal freedoms and choices (so I have to enable her to be out the trolley etc); me being task-focussed and not taking the time to engage her at her level (so me making everyday tasks interesting for her and allow her to participate in them with me).
It is hard work though. Some might think this looks like pandering, but to me it's a win-win as be both get what we want. You do need to schedule more time for any activity to make this happen. I also remember DD tires quickly, so her brain wants to do more than the body is capable of = frustration. OK at this point, the coffee shop for a rest and refreshment (caffeine + cake for you!) is your best friend.
Have you thought about getting some support in RL? Counselling might be helpful just to have someone listen to you, and to allow you to talk through all your feelings. A dedicated piece of you-time that might be helpful. I think your GP could refer if that's something you might find worthwhile. Stay with us on here too xx