I spend too much time on songs and end up ruining them/making them too complicated
I don't listen to anyone's advice besides other musicians
I disparage my girlfriend's opinion when she says she doesn't like a song.

I end up using almost all of my time making the drop of and song and use waay too little time on breakdowns, I usually make my kicks WAAAY too loud when starting a track and I also tend to over compress things alot.

The last thing I was working on I'd written down what needed doing to finish it, but every time I opened the project I ended up fiddling around the edges and not doing any of it.

I make things way too hard for myself and try to make virtually everything from scratch, which I guess is good in the long run, but it makes "the long run" about 50 times longer. I take like 3 or 4 months to finish a track because of this and because I tweak little pieces of tracks in ways barely anyone would notice for weeks at a time.

Also I have fairly consistent struggles with self-confidence when producing; I compare my songs to my favorite artists and think, "How the hell did they do that, I'll never figure that stuff out." I've gotten better about this recently, but I still fall into that mindset sometimes. It's pretty toxic when you're trying to be creative.

finish a chunk (20-40 seconds) of the song  and then browse the internet for another hour looking up random videos or doing a/b comparisons. super bad habit.

Hitting the limits of my production knowledge then just fiddling instead of going away to learn shit