I’m sorry, but your solution to bad bulbs is to say “you’re holding/using it wrong.”
It’s not my fixtures’ problem.
It’s these crappy bulbs.
The bulbs not being suited to certain uses doesn't make them bad bulbs, it makes them more limited. There are bulbs that are good for external use and ones that are not; but that doesn't make the external ones "better", it makes them different. There's tradeoffs. And the tradeoffs for LEDs have gotten better over time, but are still there.
You don't go buy offroad vehicle, then complain it doesn't drive as comfortably on the highway and say it's an objectively worse vehicle. It was designed for a different goal than the 4 door sedan you're comparing it to. It does better at that goal, and worse at others. And, over time, offroad vehicles have gotten better on highways; they'll just never be as good.
- Older LEDs house bulbs were much worse than newer ones; far more prone to failure from "things". I had many of them fail after only a few months because our power was "flickery" and their power supplies could not handle it. That's _far_ less common now.
- The power supply / controller circuitry is not a fan of heat. Don't mount them upside down (so the heat floats up to the circuit) and never mount them in a recessed mount. The heat buildup will destroy them a lot quicker. That being said, this advice can be ignored is you're paying attention... mounts that have a way to heat to escape; bulbs that are designed to go in upside-down mounts (maybe?), etc.
- While you certainly don't want to always buy the most expensive bulb, you also don't want to buy the cheap ones. They are far more likely to be made from poor, failure prone components.