Is the Insignia F50 75-inch good for gaming?

It is basic for gaming. The 60Hz panel and lack of HDMI 2.1 features mean no 120fps and no variable refresh rate, so fast console games will look softer than on a gaming TV.

Does it have a good picture in a bright room?

It is best in a dim to average room. Peak brightness is modest and there is no local dimming, so HDR highlights and dark scenes lose detail in strong daylight.

What is included in the box?

The TV, its stand legs, a remote and power cable are included. A wall mount is not, but the set uses a standard VESA pattern if you supply one.

Does it run Google TV with Netflix and Disney+?

Yes. Google TV is built in with Netflix, Disney+, Hulu and Prime Video available, and you can add more apps from the store.

How many HDMI ports does it have?

It has three HDMI inputs, along with Wi-Fi and Ethernet for streaming. That is enough for a console, a soundbar and a streaming stick, but not much more.

Is it worth it over a smaller name-brand TV?

If screen size matters most and you mostly stream, it makes sense. If you care about brightness, motion or HDR, a smaller mid-range set from a major brand will look better.