My oldest mod (that I know of) was an IPV-5. I've retired it but it still works. I hope I don't curse myself, but I haven't broken a mod yet. I do search for durability, and the longer I vape, the more I try to take care of my mods. My Steampunk nano is a total workhorse. I've pretty much done most of what you can do to kill a mod to it, it just keeps going.
And yes, if you want longevity, you need to look for quality. Given the rapid rate by which you seem to go through mods, I'm wondering if there is some similarity to their death? Either you are buying substandard equipment, but if you broke an Ages, that had to take talent. IDK. I'm not trying to call you out on anything, but as someone who is also quite hard on mods, I'd say look for durability (and yes, that sometimes comes at a premium but not always) but maybe consider if there are things you may be doing that are decreasing the life of your mod. Perhaps you are just unlucky, but if there is some sort of pattern going on, (I heard fire button a lot) you may want to care for and feed your mods a little more as well. Etc.
IDK, me and Kangertech, for example, have an unhappy relationship. There is no way I'd ever buy another KT mod, because they break when I look at them funny (this was back during my dual use attempts) and there are other vapers that just LOVE them. And, I'm not stating KT is bad, just bad for ME.
Durability: I am a fan of Teslacigs. Especially the metal mods. I think it would be fairly tough to break, say, a Punk (220 watt) metal mod, for example.
Best of luck,
Anna