Maybe you should google the official FIFA document on offsides and educate yourself on the rules. Come back to me when you find the example where the situation of the Britos goal is not offside. I will spell it out for you here even.
Read page 1 (general rule): There is only no offside if
- in his own half of the field of play
- level with the 2nd last opponent
- level with the last 2 opponents
- from a goal kick, throw-in or corner
None of these situations applies to the Britos goal.
Page 5: Offside is called when the head, body, or feet are nearer to his opponent's goal line than both the ball and the second last opponent, arms are not considered. In the replays it clearly shows his feet are ahead of the last defender and the ball player but you will probably dispute this as your vision is probably blurred
so it will be "borderline" and the VAR will see it exactly like you.
Then read page 10 - While in an offside position there are 3 things a player cannot do:
-interfere with play
-interfere with an opponent: if you need further explanation because you probably do: it means for example "clearly obstructing the GK's line of vision or
movement" from page 17, bolded part relates to Britos standing right behind Mignolet and impeding his movement of making the save as the replay shows he is being touched and that effects the movement of Mig's arm.
-gain an advantage by being in the offside position: playing a ball that rebounds to him off the crossbar, post or
opponent having previously been in an offside position from page 22, bolded part relates exactly do how the ball rebounded off Mig's hand from a save. But no you somehow will construe that Migs "played the ball" as if it were a pass or something LOL.
The Britos goal situation ticks those boxes quite clearly. I don't see how you can argue against it. So what you have been banging on about is the VAR would've definitely not ruled out Watford's goal which flies against every single black and white rule about offside. Ok...sounds legit.