I'm trying to be respectful of your feelings because I know you are upset.
I will point out a couple things. FT is extremely CONSISTENT about labeling authentics "authentic" and "styled" means a clone. I think you just don't know this about FT yet, but this is their way of identifying it for you, as believe it or not, many folks DO want a clone of a more expensive item, especially in the world of rebuildables.
FT shipping IS what it IS. There are a few things you can do to (sometimes) speed up the process, like using a USA epacket, but really, a lot of it is the luck of the draw, and when the next barge leaves and to which port it is going to arrive in. FT doesn't really have control over that. They do state that if it's more than a few days, and one item is on backorder, they will split the order for you at no charge. NO China vendor can EXACTLY guess/guarantee when an item will be back in stock, which is why you should be prepared to NOT order back ordered items in a rush.
Also, if you need something fast, FT is not your vendor. If it's something you don't NEED rapidly, but still have a use for it can be extremely useful, but you do have to be prepared to wait up to a few months possibly, to get some orders. Again, luck of the draw and pot of entry.
I think a lot of your issues, while understandable if it wasn't the service you were expecting, are understandable although MAINLY you have unrealistic expectations of the vendor .The things you are mentioning as negatives are ONE reason prices are so reasonable and stock status is so high. FT, believe it or not, is GENERALLY one of the more reliable China vendors. If you have an order number you can use 17track.com to track it across the world although I just generally try to be patient and understand that it will SHOW UP when it shows up. Period.
100% of my FT orders have arrived, they're excellent at tracking your orders FOR you if you have a customer account, and FT has 100% been what I ordered, I have never ordered an authentic and gotten a clone.
The trade off to all this is paying more for a US based vendor. I will also note that places like ebay and amazon (which in the US do NOT have vape gear at all on offer) are really bad places to order from you have a much higher likelihood of an UNLABELED clone, or say a "refurbished" one, so I'd say stick to the know excellent USA vendors if that is a concern for you with FT, but be prepared to pay more. You will buy less, but you will receive it sooner, and you won't have to look for the word "authentic" although I should note that if you choose the wrong US vendor, some sell clones (labeled or unlabeled).
Finally a few things I wouldn't probably buy from fasttech, batteries or eliquid, although I do know folks who are just fine with their eliquids and they probably are fine. I only buy batteries from authentic trusted suppliers listed on Mooch's blog, (you can check the chart on his blog) because it is the ONLY consistent way to ensure authentic batteries, PERIOD.
I think a lot of your FT issues are issues surround the fact that you don't understand how Chinese vendors work. FT has been 100% reliable for me. Everything I have ordered has been what I ordered, and they have never lost a shipment.
Apart from shipping times, I'd rate them higher than a LOT of USA vendors, frankly.
Best of luck,
Anna