There are some fans who support teams cause their favourite players play in it. But it’s not as common to change the team you support cause your favourite manager left and personally I think that’s a fair metric too. I really like Jurgen Klopp’s style of play, if he left Liverpool and went to like Ipswich town or something then I would wholeheartedly support Ipswich town over Liverpool. Is that weird?
It’s already weird to change team based on a player, so I guess yeah. But, hey, do as you please.