I don't see obvious evidence of 'curiosity' in your replies - they seem more like someone who roughly throws all statements about linux into assumed "linux rock

I don't see obvious evidence of 'curiosity' in your replies - they seem more like someone who roughly throws all statements about linux into assumed "linux rocks" vs "linux sucks" buckets. If I've misinterpreted you, I'm sorry for my part in that. You've clearly misinterpreted what I've written, and to the extent that's due to my lack of clarity, I'm also sorry about that. But in any case I'm a linux admirer - I doubt I've had a work day in the last decade that hasn't involved using linux on servers. As I thought I had made clear, the issues I found with my laptop Ubuntu installations are probably largely fixable with reading & research. There's a fair bit of information about them in (for example) the Gentoo and Arch linux doco sites. But I'm not looking for answers because that's not how I choose to spend my time. There's enough else to deal with in life, and I am no longer an OS hobbyist who does this stuff for fun.