1234Doug, sorry to hear about your issues. The shifting does get a lot better after miles and an oil change. My wife wasnt happy with ours at first either, but at 1,200 miles it is a much different vehicle. The Turf range issue is a very common and easy adjustment under the driver's side rear footwell. I'm not sure if the dealer is supposed to check that before delivery, but it appears most don't. I was able to adjust mine easily. There is a good post on here if you search. I'm not sure about the seatbelt, but your dealer should be able to help with it.
I was surprised about how many little things I've had to do to my 2017 considering my Honda ATV's and dirt bikes have been perfect from day one. I am very happy with my machine now, and I did a lot of research before buying. This forum pointed me in the right direction and i was expecting some of it because i researched here before buying. Most other UTV's seemed to have more major long term issues, so I have no regrets.
I hope you are able to reach that point as well. Good luck.