international team is tough.
local leagues are way easy but money is problem

Professional footballers play around 60 matches for their clubs every season. And by the time they play for their country, they become tired and lethargic. Most players retire at the end of careers.
It’s true that playing for your country means more to them. But these players earn a living playing for their clubs. It’s their rice bowl. They need to focus on their career and family first. After every season, they just want to spend more time with their family. Playing international games means more time is spent away from the family. And this effects their mental and physical health. Not to mention their family.
Players like Paul Scholes have benefited from retiring from international duties. He has been clearly a better player for Manchester United.
You can’t retire from your job so early. They need to decide which is important. Career/Family or Country? It’s clear…….

some players, the ones with the biggest egos, often get into fights with their management or don’t get along well with the team.

Hobby? Staying healthy in retirement?

Perhaps they are tired of International play and want something less demanding?