I have a Janome that was skipping stitches, so I bought the special Purple Tip needles which is made to stop that problem. I have not had skipping stiches since so I highly recommend them. However...someone told me that they don't work on a Brother so I did a bit of research and found these
https://allstitch.net/product/organ-...retch-1469.cfm
The little blurb says it's the same needle as the Janome Purple tip, so it could be worth a try.
Good luck! I know your frustration well.