This community is mostly used by fellow users, not Adobe employees. Some Adobe Techs might enter in discussion. As such, most of us cannot do what you request. And as the number of customers having drastic problems is limited to a handful, at least as seen in this community, Adobe is not likely to abandon the upgrade.
You could always rollback to the previous version
Now, moving on, Your fellow members might be able to help you solve your problems, but what are they?
Can you provide more information about your problems?
Full Adobe program name and version
Full Operating System name and version
CPU, GPU, RAM, hard drive and any other specifications that might relate
Any error messages, both a screenshot and a typed in copy (as to aid in translation)
Any screenshots that might help describe the problem
And if course, complete description of problem(s)
Members are having issues with v11 that relate to, but not limited to:
Being early implementers if MACOS Monterey
Being early implementers if Windows OS 11
Having an older IS that meets minimum requirements, but might not be sufficient for some capabilities
Out of date video drivers (one are being masking sky and/or subject)
Out of date GPU drivers
PS install that went poorly
LrC install that went poorly
Preference file that were corrupt, or going corrupt
Catalog upgrades that upgraded the wrong catalog (might relate to above)
Not reading documentation on what is new
Not viewing tutorial videos of what is new
Not knowing that some items in the GUI have been relocated/modified
Not accepting that LrC must improve. complacent with old workflow, Not happy with change. These members not happy with masking. Tough.