Theres no guarantee in gambling, the possibility of failure is always accompanying you on the process of betting. Analysis only serves as your tool to minimize the possibility of lossing.
Every gambler can analyze the game as that is necessary but it doesn't mean that when they do that, they will easily win.
Take it from my experience, I always analyze carefully when I'm capping games but still most of the bets are losing bets that's why I am not profitable if I have to compute from my start here til now.
Youre not alone in lossing some bets. I too have a lot of it. I mostly have lost enough bets through betting in a point spread in sportsbook. Game analysis wont really make a huge impact to the outcome specially in point spread betting, not unless if youre betting straight to the winning team without any odds or handicaps which usually takes place in a sportsbar, not online.
Its still good that the OP have pointed out some of the most important tips to consider when placing your bets to any sportsbook.
Yeah we call it player stats and team stasts in general. But, what I usually do when betting is to look first on whos gonna be the opponent of your favourite team and watch some of their past games from the past season or current season match up, because every team has its own types of playing style and the coache's coaching style whether offensively or defensively.
Doing a team analysis is similar to a player whos trying to improve his game, they both watch the tape after every game.
I dont know If I did my analysis right, because I feel like I lost my bettings more often lol.