Looks like quite a bit has been added to the box. Adding up the breakers against the service amps isn’t that relevant. In general, you never want to have more than 80% of your power being used, whether for an individual circuit or the entire box. 150a is fine for many houses. But When you start adding a second AC unit, well pump or you add a pool, that’s when you need more amps. 200a service is the standard today. Looks like you’ve go 2 ac units, electric dryer, electric stove and cooktop, that’s quite a lot of power to pull on 150 amps. I’d be considering upgrading, but I don’t think that’s your issue.
What else is running on the circuit your game is running on? It’s possible you have a bad connection somewhere along the line, either the outlet or the lights, or even at the box. One pin should not cause dimming lights on a 15a or 20a circuit, but it depends on what else is running.
