Same. When I started to take my hobby seriously I was basically replacing a "cheap" soldering iron every couple of months and tips would have lasted me a couple of week.
When I done the maths, it has become quite expensive.
So that's when I decided to buy a Hakko FX-951 and I couldn't have been happier. It makes a huge difference between the cheap ones.
It's been working well for over 3 years now, no issues. Just make sure to use original tips. I had some knock offs and some have burned off the same day I started using them. Original tips last ages.
Don't get me wrong - the cheap ones will work and are great if you need to solder something from time to time. But if you plan to do some serious amount of soldering, don't bother with cheap tools.