Why is he so wrinkly? ☹️

Question

Hellooo!
I recently reported these tiny cactuses on a bigger pot. Two of them look nice, bit this little one looks ‘deflated’?  
I’m not watering them as much as Greg suggests as I thought it could be an overwatering issue… but it’s not changing… it looks sad and wrinkled…
Does anyone know why or what should I try? Any advice will be highly appreciated ☺️

@Lunatik4 · Answer

Needs water, but not too much or often. 
If it were due to excess water, the plant would already have died. I have a domino cactus that is also like this and it has been due to lack of watering.

@ThoughtfulAlula · Answer

It looks like too much water but it could also be too much

Why is he so wrinkly? ☹️

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