Cheaper materials, poor fits

I love doing the pop pilates / blogilates routines every day.
I started to buy a few pieces from Cassey's collection, when it was beginning. The first products were a bit odd - like the lace semi-cropped, 3-quarter length sleeved shirt with a very asian influence so it looked weird on me (I do not look good in what I Thought I would) and the material was cheap. Then a few years later I started with the heartstrings bra in peony, a black flowy tanktop and black criss cross leggings.
The leggings ripped on the side almost right away (see photo).
I got another heartstrings bra, at a 2for1 sale on the site, and got cabernet and black.
The peony bra fits amazing, true to size, full coverage and comfortable.
The cabernet one I had to size up and it was so low cut that in a down dog etc my boobs were falling out! The material is also cheaper quality and shiny, and the centre seam is not aligned.
The black one is even smaller and I should have sized up x 2. The material is also shiny and cheaper, and again the centre seam wasn't quite aligned. The straps also stretched and broke as I attempted to put it on - all I could hear was ripping, and then I had to sew every seam where the straps attached.
I won't be buying anymore of her clothing unfortunately as it is just not up to the same standards it once was. Further, when I posted a critical review, they denied putting it online for the criticism.