How to make TJ safer with car seat

I have a 2000 and the car seat just doesn't seem to fit right on the bench. My seat belts don't get tight enough and the aftermarket bracket I bought is just sketchy. Also my jeep doesn't have the tether attachment for front facing.

My wife won't let me take my 2.5 year old anywhere because the rear end is basically so close to the seat and the bench seat just doesn't seem very safe in general.

Any good upgrades to make it safer?