All gas goes bad over time. Fuel treatments help a lot. How you store your boat will matter. Condensation can be a factor.
Before I store my boat I run as much out of the tank as possible which is fairly difficult to gauge as my fuel gage isn’t the most accurate. Before I pull out of the water and have it trailered I disconnect the fuel line and run the motor dry. I add a little Stabil and trailer it home which mixes the Stabil in. I store for around 5 months. Fill up with new gas for the new season and haven’t had any issue yet. I’ve done this for 30+ years.