Today I did my first advanced spreadsheet on LibreOffice after switching to Linux, and it handled itself pretty well. I had to search for some features on the web at first, but after I got it down, I felt comfortable using it. Also, LibreOffice’s default menu layout is not pretty, but I can find all of the functions with just a click, unlike MS Office’s ribbon menu where I had to click around to find what I was looking for. Sorry for bad English.
Right you are - two finger is part of the touchpad device, and everything above is a “gesture”. This is enabled, and it works, but badly. Looks like a known issue: https://ask.libreoffice.org/t/how-to-slow-down-scrolling-speed-on-touchpad/18582