I just have no luck with mech's, that was actually my third. First 2 I got just didn't work. First was a Kamry mech mod shaped like a pipe, but it needs a proprietary adapter, which literally no one makes, and would take $30 in new tools for me too make myself. Second was a "Wolverine" that worked about 4 days before the fire button failed.
No Offense Bro but,,, Simple Answer to your negative Experience to date; Don't Buy Junk. Seriously.
Caveat Emptor in ALL things. Not just Mechs but ALL Vape Gear. Isn't that the Case with Any & Every Purchase?
As Suprtrkr said, Research, Inquire, and self-Educate here on ECF. Do so and your Woes & Sorrows will either be Nil or at the very least VERY minimal.
No Biggie. Chalk the relatively Cheap Lessons up as your "Crash-Course" Intro to Vape Devices and move Onward and Upward accordingly. We've all been in similar Classes to some degree and varying severities along our own Journeys. C'est La Vie.
As for Mechs in general,,, Do Not allow these Personal Failings & Turd-Tubes to be falsely extrapolated into a wholesale Convictions on Mechs. To do so would not only be defeatist and Weak, but will deprive yourself of some truly Awesome Experiences and remove a wonderfully rewarding Aspect from your Vape-Life.
When over this "Stumble" and the injurious blow to the Ego & Psyche, do some Studying-Up here on ECF and gain a healthy & knowledgeable Perspective. Armed with that Intel you will then be able to make an Informed and Intelligent Buying Decision.
But Once More with resounding Resolve... To convict and subsequently buy into the False Mantra of the Plain & Simple that Mechs are Junk, Useless, Inferior, and/or Dangerous would be a monumental Mistake.
As in All things like previously noted, they "can" be. Same goes for Variable Mods, Tanks, Batteries, anything and everything we Vapers use. That being inarguably true, thankfully none of us here have allowed that Fact to dissuade us from a Hobby and Passion that literally has saved our Lives.
Likewise, All Vape-Shops are not created, Staffed, and maintained equally. Some are Awesome, some "meh", and some just downright Suck. Again, C'est La Vie.
Here in the relatively small Town/Area I live in we have 3 "Shops". Perfect Example of the above. Took going in, checking them all out, making some mistakes early on, learning from them, and then smooth sailing only patronizing the One. Same as an Eatery or a Mechanic or a Convenience Store and so on Ad Infinitum.
Sure it would be "nice" and Oh such a Wonderful World indeed if All Purveyors of All Things would take due Diligence in the practice of their Retailing. But, this ain't Never-Never Land Mr. Peter and Dorothy most certainly ain't in Kansas anymore.
It just isn't and it just won't ever be. Accept that Fact and take more Personal Responsibility for our own Actions, Decisions, as well as the Consequences and Ramifications thereof.
We are All Big-Boys & Girls right?
Shake It Off. Educate-Adapt-Evolve. It's ALL Good.
Enjoy & Vape-On!