Why do some people block u after they lose?

Go to their profiles and check whether u can send them messages or not

I block everyone I lose to, to reduce the chance of losing again. More people I block, more chances I have...

Whenever manvik offers draw I don't accept when I win but if he loses he directly blocks me

#13 same

OK, then I guess they block you because you keep sending them messages to see if you're blocked! :D

I had a weird game with a player in Hourly Atomic Arena (I don't remember his/her name) maybe yesterday or before that, who blocked me before playing and then completed the game...Why is it so ?

#16 There is a slight chance to meet and play blocked people in tournaments.That is because everyone could just block strong players to gain an unfair advantage in that tournament,so that's how it is. :)

Ask yourself: Do you have annoying habits? Offering draws all the time? Requesting takebacks?

Besides that: Especially in shorter time controls like Bullet you sometimes have matchups in which one side is still mainly playing chess and the other part is mainly playing for the flag. Not necessarely on purpose but simply because one side is the clearly stronger player but much slower with the mouse. I have never blocked anyone because of that but I would understand the logic if someone has no interest in playing such games and simply wants to avoid them in the future.

Maybe also not the most sportsmanlike behaviour but Lichess has such a great pool of players so who cares if one of them is blocking you:p

@PizzaTonno completely agreed, I flag many players. Never thought of it this way.

I have never come across this till now. And I feel that if a person lose a game then he/she block block me then I will think that I am far good chess player then him/her. I wouldn't think why he/she block.