I made a pcb and was wondering if anyone could give some positive/critical feedback on the board so I can make sure it is at its best before I send it in for manufacturing. The goal of the board is to bring down a 4s volt board, or 16.8 max volt board down to 12 volts, 5 volts, and 6.8 volts to distribute the power to different components based off the voltage needs. It also has an integrated temperature sensor, and a place to put in and control a fan with a stm32f072 microcontroller. There are 2 6.8 volt buck converters because the 3 motors I will be powering will be using over 5 amps where 1 buck converter can only output 5 amps. There is a ground plane built in on a 4 layer board. I have not put in built in power plane. The minimum trace clearance betweeneach trace except at components is 10 mils. The 2 pads on the tiny components are bridged on purpose. They are VIN pads that are supposed to be linked.

 

One thing I noticed, there are some track joins....

Whilst that will work, I generally only have tracks joining on a pad of some sort.
This one is particularly a problem..

The sharp angle can trap enchant and continue to corrode, although this is probably no longer as big as a problem it could have been some years ago, but if you etch your own PCBs, just make sure the board is very well cleaned.
I also do not have any 90 degree bends but use a couple of 45s.
The track widths could be a bit wider too.

Mostly, on my PCB designs, I try to make them look good as well as work.
My comments here are largely cosmetic.

But after all that, well done and I hope it works well for you.
I get my PCBs made by. https://jlcpcb.com/ and have no problems with them at all.
I've no affiliation with them so this is just my own recommendation from my experiance.

 

Now that's much better. Still a few tight clearances.
I always think of vias as being a weak point on a pcb (does anyone else agree?)
So, you could put R7 inside the VOUT2 track and save two vias.
Around SERVO3, you could take the track between the two rows of connectors (where it says 1X03M) on the blue side, then the track to the middle pin of SERVO3 can go between the two rows of pins and save some more vias on the track to R14.
I think you still get charged per hole, so it would save you a few pence.