How can I discipline myself to play through a game?

I have 4 games for my Nintendo Switch so far and will go to the Media Markt next week to see what games there are. I haven't played any of my games yet because I often just look around for new games and find them so interesting that I buy and play them. It always goes on like this, it's like a vicious cycle. Do you have any ideas on how I can discipline myself to play through a game before buying a new one? 😅

If you love a game enough, you don't need to discipline yourself.

I've had Gears of War 3 ten times now and still play it today.

Maybe you don't want to play at all, but you lack human company?

Well, I play through most of the games to make a judgment. Otherwise I find, if you don't like it at all, then give it back or inform me about it.