Oil reset is not a problem, it is a feature, the vehicle is to specification and it does not stop the vehicle from working.
Doors not shutting is an adjustment and is a warranty job.
Door seals falling off is a warranty job, (the only outer door seal not already changed is now coming off my truck - it's a build problem, the wrong glue and not wiped with panel wipe before assembly. They changed the build process, so I'd be interested in your VIN, as it should not be happening with later vehicles).
Now the water can be one or more of a number of issues, all of which are warranty fixes, none of which are difficult. Owners have reported leaks through the windscreen, safari roofs, leaks from the HVAC and A/C condensate. In some cases, some drains have need to be re-routed, (that was my issue).
If you want to go down the lemon/rejection route, you will need to give it to the dealer for rectification at least once, depending on jurisdiction. Check with your lawyer or consumer protection.
There are others who have had nightmares who have either been settled out by Ineos or given a replacement vehicle and are now happy. You need to make the next move, and it has to be via the dealer. I'm sure it is inconvenient, but nothing will change until you do.