@Karl Clements I think you should take some time to read the repository, and some of the threads here. Some of these issues have been discussed in detail. But I wouldn't call your boat a POS, or bad investment because of these small issues (except for the engine). Im still going through my boat's engine to try and find a hose that could have come off the exhaust without water intrusion. I need pics. Your issue might not be the exhaust at all. As far as intake, the filter might have fallen off. But that happens some time. Its a simple turn of a flat head on the base to fix. No biggie.
The water in the locker as Slugger says is a known issue. I have it as well. Im thinking of drilling another hole in the rear bottom, and placing a grommet, and screen to fix it. I dont want dirt from my ski's or fenders being sucked up by the bilge pump. That is a mod for the fall or winter.
When starting the boat, let the computer cycle, and reset. The gauges will sweep. When they are done, then start the boat. This will ensure you don't start in limp mode, or throw a code.
Weather stripping is an issue with any boat. They all come off, they all tear. Just take advantage of your warranty, and get it replaced. But its not hard to do it yourself.
Take time to know your boat. The Scarab isnt perfect by any means. There are people that have had boats replaced because of issues. Yours aren't that bad. Hang in there.
I apologize for being aggressive towards you in the beginning, but this community prides itself in helping each other. Most people come here for help, or info. But when someone joins, and their first post is as your was, it sends out some red flags.
Welcome to the community.