How can I downgrade to the latest libreoffice 5.x safely in Fedora?

Nowadays people around me have a suspicion if libreoffice is driving a kind of Planned Breakdown of the open source upgrades for the benefit of M$ or something.(Please refer to the recent Firefox’s planned unshielding-of-all-its-addons disaster about which people are talking about how deeply Google is influencing the development direction of the firefox)

I can’t stand a sudden CPU boost of soffice at any time without any reason any more since I upgraded to 6.x.

Plz teach me how to downgrade to the non-contaminated 5.x version safely in Fedora.

You better should check “people around” you.

Solved:

sudo dnf remove libreoffice*;
sudo dnf clean all;

https://downloadarchive.documentfoundation.org/libreoffice/old/5.4.7.2/rpm/x86_64/

download: <<LibreOffice_5.4.7.2_Linux_x86-64_rpm.tar.gz>>

tar xvzf LibreOffice_5.4.7.2_Linux_x86-64_rpm.tar.gz;
cd LibreOffice_5.4.7.2_Linux_x86-64_rpm/RPM;
sudo rpm -i *.rpm;

Voila! I get back to a peace of mind again! Though, many new users will still suffer from unknown bugging and will eventually move to M$ at last.