I don't even know if the products I could gripe about were ever considered "hyped" at one point, but I do have a list and LOL why not get it off my chest.
1) Kanger Mini Protank 2. Mainly coil issues. I work in a B&M and cringe whenever I have customers ask for Protank coils. But the tank leaked a lot. I don't dislike all Kanger products; I'm using the Aerotank Mini on an MVP2 at 8.5 watts and it's working fine (for the purpose I use that setup) and the newer EMOW kits seem awesome.
2) Add my name to the Mother's Milk "whaaa?" list. I had a love affair with that flavor for approximately three days when I could really taste a lovely creamy strawberry. Soon the flavor became tangy and left an unfortunate aftertaste. I bought two more bottles just to make sure it wasn't just a one-off weird bottle. OTOH I just got a bottle of OB and so far I'm happy with it (in an Atlantis).
3) Very sadly, Custard's Last Stand was a great disappointment. Even kept trying it periodically but after a four-month "steep" almost half a bottle made its way to the trash can. "Taste is Subjective"
4) SVD. Fire button issues, of course. Had it for a month before it turned itself off far too frequently to be attributed to user error. PIF to a friend and she reported it stopped working beyond redemption another month later (about three months after purchase).
5) Five Pawns Castle Long Reserve (just my preference) and Perpetual Check. Again, I work at a B&M and whenever someone comes in all hyped to try it for the first time I just keep a poker face. Lol
6) my first istick's threading stripped quickly. Afterwards I installed the 510 connection on my other two and no issues since.
7-1000) The multitude of e-liquids I've bought in the hopes I'd find a new ADV. Now I'm content to almost really love three flavors. I hate being so picky but I just can't fall in love with fruity or candy flavors.
On the other hand, I'm extremely happy with the gear I own now. Between some box mods and knowing how to rebuild (not to mention the Atlantis) I'm a lot less prone to buy duds or a product I'm not sure will perform well. The learning curve was steep and I didn't include a bunch of things (mainly tanks) that were stumbling blocks to the place where I am now in my
vaping journey. It's frustrating trying to help customers who are having problems like the problems I used to have without ending up overselling to them for where they are comfortable being. The best I know to do is reassure them that they can get to where they want to go if they are patient with the learning process, and not every coil will work as well as the last one.