As soon as I installed Mailspring, Dropbox, OnlyOffice, Deja Dup backup to Google Drive and Vivaldi, it has become impossibly slow. Is anything in that list something I should be looking for that is lighter on resources? What about KDE, or should I look at lighter weight DE like xfce given the below specs? What about RAM, do I need 8GB? It was originally on Windows 10, so at one point it ran ok. I was really expecting performance increase with Manjaro. Help please.
Operating System: Manjaro Linux
KDE Plasma Version: 5.23.4
KDE Frameworks Version: 5.88.0
Qt Version: 5.15.2
Kernel Version: 5.15.7-1-MANJARO (64-bit)
Graphics Platform: X11
Processors: 4 × Intel® Core™ i3-5005U CPU @ 2.00GHz
Memory: 3,7 GiB of RAM
Graphics Processor: Mesa Intel® HD Graphics 5500