Wifi works and drops after patching iMac 18,3

I successfully installed Sequoia on my iMac 18,3 (upgraded to 24GB ram and SSD upgrade) from Monterey using 2.01. Also used my time-machine while reinstalling with clean install.

The wifi sometimes works for 2 minutes and then drops. Sometimes it works again but then drops again.

Applied the post installation root patch, even several times.

I looked for answers here, but people normally don't have wifi at all.

Also, when I boot up, after providing password, it takes, in my opinion, much longer to see the desktop than before.

Can I restart from scratch using the USB drive used for installation?

submitted by /u/NoBullfrog4032
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