You will spend three and a half hours watching about 13-15 minutes of football.
The NFL is a huge success because America is filled with morons.
My eyes were opened when I lived in Australia for 25 years. The game of rugby league is far superior to American football. Games last 80 minutes and are 90% non-stop. There are no "offensive" or "defensive" teams. The same players stay on the field and must fill the roles of offense and defense. The ball-handling skills of the players are breath-taking, along with the kicking skills -- you must kick the conversion from where the player who made the "touch-down" crossed the line, as opposed to American football where the conversion is always attempted in the middle of the field. Lots of conversions in rugby are made with the kicker just a couple of feet from the sideline -- very impressive. I think this is why rugby league doesn't get much tv time over here. You would have huge numbers American football fans being red-pilled.
The solution to this is NFL Red Zone. I'd given up on the NFL for all the same reasons that most others have in the past few years. But for pure football, NFL Red Zone can't be beat. If a game pauses, they move on to the next game. It can get a little hectic but it's the best way to watch the NFL.
In a half hour I can see 30 minutes of football and get a good feel for what's going on around the league, then get on with my day.