Crooked compression fitting: leave be or replace again
If it doesn't leak it's OK. It looks square where it goes into the compression fitting.

BTW you didn't need any Teflon tape, but leave it alone now. Teflon tape or pipe dope is used to seal pipe threads exposed to fluid under pressure. Certainly in the compression fitting the threads are used to compress a soft metal seal against the tubing and against the harder metal of the fitting; the threads don't have to be water tight.

With the brass adapter to the flexible line, I believe there is a rubber seal in the flexible line that the brass fitting seals against.

The classic junction requiring sealing of threads is normal pipe threads (NTP),  also called IP for iron pipe even when the material is not iron or steel.