I downloaded Electrum-3.3.4.tar.gz, unpacked, and ran ./run_electrum.

I get:

  File "./run_electrum", line 53
    sys.exit(f"Error: {str(e)}. Try 'sudo python3 -m pip install '")
                                                                               ^
SyntaxError: invalid syntax

I didn't want to "update", but my balance-monitoring using 2.9.3 stopped working at some, it's just perpetual "Synchronizing".

So shoddy all round.  Not an ongoing solution to anything, will find new solution for monitoring address balances.