He's got it for Easy Car.Michael Schumacher rode in more teams and not easy ones and Lewis Hamilton was only in McLaren, he passed to Merceds, I have such an impression that Lewis is overstating that the race is tough in 2020, but I believe him.
I am assuming you did not follow F1 during 2002 or 2004, as you would know the cars Ferrari built during that time, were one of the most dominant F1 cars ever raced (Frequently, the cars would be around 1 whole second faster a lap, compared to the nearest 2 teams, Williams and McLaren)
M Schumacher actually raced predominantly for 2 teams in his first career (barring 1 race for Jordan in '91) so it is actually the same number of teams as Lewis.
I do agree with you though, that M Schumacher did have, as a whole, tougher cars to drive, with the 1996 Ferrari trumping the 2009 McLaren in that respect. But both drivers managed to win races in those cars.
As for 2020, and previous years, it is an open secret that Lewis and Toto play these 'it will be close in the race or championship' games, as not to incur the wrath of the FIA, and keep their advantage. Like it or not, it is part of the battle, and we are seeing that this season with the various front and rear wings challenges. Whoever wins on all fronts, will become the champions this season :)