Unstable players,playing styles and formations

Have you guys noticed that some players though looks to have very high stats but does not perform as the stats indicate?. Also some players initially plays really well but after sometime they will not perform as well as they used to be. Same things happens with team playstyles and tactics. If we use same tactics for over certain matches then after sometime for weird reasons you will see its not working properly as it used to be. Is it just me?. Some players might have exact same stats but performs differently(for example both suarez and kane have 99 finishing but kane finishes much better than suarez for me. my mbappe feels faster than noah okafor who have higher speed and acc.) discuss your experiences.