That was indeed one of the soil brands that was called out as having extremely high TDS measurements (too many minerals).
Panman said that the flytrap was planted much too deep...I'll say that it's probably one of the deepest plantings that I've seen (not good). Even if you don't have a different grow mix right now you need to raise it up so that the crown of the plant, where the leaves emerge/grow from, is above the soil level.
A basic 50:50 (non-MiracleGro, non-Sta-Green) peat moss and perlite mix would work. Or, go by Lowes and pick up a small brick of BetterGro LFSM. If you decide to go with the peat moss be *sure* there is no fertilizer in it. Also, don't even use the Miracle-Gro perlite, there's a touch of fertilizer in it so why risk it. Another "iffy" brand is Mosser-Lee that you'll find at Home Depot and other places.
You will find that the smaller packages of ingredients are the more expensive. Pre-mixed packages of "carnivorous plant soil" are usually the most expensive. I see one premixed "Killer Plants" brand that is advertised on Home Depot's website that costs $15...for a 1-quart bag!!!
Conversely, you can spend $40 ($20 for a 3cuft bale of Premier peat moss and $18 for 2cuft of Vigoro perlite) and end up with around 150 quarts of mix! Big difference in cost per pot!!! But, it depends on your storage space and whether you anticipate getting more carnivorous plants whether you want to go with larger packages of ingredients or not. There are also some in-between sizes that you can sometimes find...8-quart Vigoro perlite for $6 at Home Depot and 10 quarts of Hoffman peat moss for $14 on Amazon. For $20 you can definitely get 16 quarts of a 50:50 mix...and have a little peat moss left over for using for seed starting or something...or to make a higher water holding mix (more peat). FWIW.
As a member of the forum you can get free seeds, too!!! Check out the seedbank...instructions for using it are at the bottom of the inventory list fourn here: Seed Bank Inventory and Instructions
Best wishes on your flytrap!