Recent updates have messed up my system

[anon89812132]

So, booting with 5.4 kernel ends with the same result? See this:

Issues installing via ISO's with kernels newer than 5.4

some specific family cpu failed to boot with 5.7 or 5.8 kernels , this is haswell & ivy bridge stay on version 5.4 lts or 4.19 lts