Let's take the JPX (Tokyo) data which is faulty, all daily bars (charts+API) have wrong closes as the closing cutoff comes in before the closing auction. This also means the volume and other price parameters are possibly wrong.
After a week with this pretty serious bug, nothing has changed.
My order issues have been unsolved for 2 months, that's horrific.
Oh, I did find a simple, rarely occurring cosmetic bug but they were eager to fix that one...
IB can brag about highest margins but it comes from not hiring enough people.
Are you are programmer, i guess IB can be quite frustrating if you are not.
Normally you can code work arounds for most issues like the JPX data bug you mention, you can collect the data yourself on a lower timescale and use the right cut off.
Also when reporting bugs you can sometime send IB code fragments if you can consistently generate the bug using the API.
There was one case i even sent them a .avi video of a obscure bug in the TWS user interface.