I moved away from MS Windows a long while back and have ported everything EXCEPT presentations. I still use a friend’s laptop just for PowerPoint.
I have used LibreOffice Impress and it is quite poor in design and the templates are very unprofessional.
I have used LaTeX beamer a lot and I am now tired of fighting it to make simple transitions look good, quickly customise a slide, etc.
Are there alternatives that I can use which are libre friendly as well as user-friendly?
Have you tried cryptpad? I use cryptpad.fr’s unpaid option and I gain one GB data. Here I can choose between markdown presentation or onlyoffice presentation. The markdown presentation is neat for quickly creating presentations. I can however not comment on onlyoffice presentation because I have not used it.