Sadly your experience is not uncommon. Warranty Service for boats is more similar to RVs and freshly built homes, where time is a forgotten factor in the elements at play. There is not much competition or contract pressures in this area, I do not know how to make it better, but I tell you that I find it a lopsided game where the warranties are promises to repair, but they don't say when. Essentially making new boat warranties, if not worthless, certainly worth quite a bit less than hard cash that could be used to repair the boat.
This was a issue even before Covid, but now it has been aggravated by it.
The alternative is to buy a gently used shaken up boat that generally will have these things already resolved, but there is a risk of new things coming up that will need repair out of pocket. It's a risk many take on purpose. Doesn't help you much know, but perhaps provides a thought opportunity to those buying new in the future (and/or enough dissatisfaction to cause a shift in the market to improve things)
Sorry you had to find out this way, Warranty services can indeed suck, and you have no real recourse, but if it serves any consolation, many other brands have similar issues with a diminished value of your time once you and your money have parted ways. Now you know. Not quite a secret, but certainly many are unaware.