It's so hard isn't it?! Especially in winter and when they don't really understand.
I'd definitely recommend reading up on sensory processing difficulties.
Agree with big and baggy. My dd wears at least 3 sizes too big. Though some kids also like the opposite and prefer soft but tight.
We've found that inside out is also easier (even seamless have seams that my dd can't deal with, plus no problems with labels either).
Also velour type fabric - especially pjs.
And pjs for the daytime.
Dd used to live in some short/t shirt type pjs. She had three pairs (though wouldn't wear one of those pairs for some reason).
For inside the house, I think it's ok for your child to be comfortable. So have stuff available but don't force it. Take the battle away totally so there's no pressure at all around clothes. My dd will also happily wrap herself in a blanket inside if she's cold - I can't afford the heating on all the time! Though she does have a couple of trousers and tops that she will wear now.
I think for going outside it's a case of sticking by your guns but as minimal clothing as is safe in the weather for the day.
Something that used to help when mine was that age is that I'd take the shoes, coat, trousers etc in the car and she was much more likely to put them on when we had got to our destination as she wanted to go and play in the park we'd just driven to etc. It had a more immediate and obvious motivation.
It will get easier as you both learn to work stuff out that works for you both. But I know it's frustrating and stressful at the time. I used to HATE leaving the house for the clothing and shoe stresses.
My dd is now 13 and still can have (smaller) meltdowns leaving the house when it's cold or wet out as she finds coats and wellies really hard to wear. (She also hates to be cold or dirty). It's much easier when she can wear her crocs and no coat or jumper (she never wears jumpers - even when it's freezing).
But she does understand more what bothers her about clothes and it's easier to help her adapt them or find clothes that do work for her.