One of the very first tricks of the trade that I was taught almost 60 years ago regarding typesetting was squint with your eyes. If you do, you will immediately see where your kerning is off.
Here, you can try for yourself: https://type.method.ac/
Now, if you apply your newfound knowledge onto RawTherapee’s logo, you will immediately spot that there is far too wide a gap between Ther and apee.
Claes in Lund, Sweden