@StefanL38 if you have Python on a machine you can create a simple "serial monitor" , I use one very often that works flawlessly up to 115200 baud rate in fact recently I ran tests on a USB to serial host at a baud of 400000 without issues. It's a fun project that you can configure to your liking and in the end you have a cross platform app.
Just because it supports protocols besides serial, doesn't mean you have to use them. Nor does it mean having them makes it more complicated. Just select "Serial" in the "New Connection" window:
Then configure baud, etc under "Setup" --> "Serial port":
You could use a copy of the 1.8.x IDE...
Note that using any external Serial Monitor probably means that it won't automatically "pause" during uploads (and uploads will fail with "Serial port in use" if you don't quite/pause the other monitor when you upload.)
I have tested uploading with HTerm running and configured to auto disconnect / connect on losing / winning focus and it works. So I'm satisfied with HTerm.
That's why i want an ANSI terminal in the IDE... because it's extra steps that beginners don't bother with and I want them to see what happens when the terminal uses cursor keys like a VT-100, you put up labels and changing or not data stays with the labels.. debug prints look more like watch windows sans frames.
Those extra steps are a pain and If I want to use PuTTY or hyperterm or leaf again I will have to read up and work all that out again, an hour easy.