Ninetails come on bruh - are you playing stupid or are you for real?
If anyone avoids anyone the matchmaker now has to consider that in matchmaking putting an added layer of difficulty for it to find a good match, the more people to use the avoid function NOT SPECIFICALLY AT THE INDIVIDUAL QUEUING will give the unavoided individual a higher queue time - the more slots people have the more the matchmaker struggles and at high ranks this avoid problem becomes a GIANT issue for the already crippled matchmaker.
Basic logic should tell you that much -.- Like you barely have to think about it, it should just occur to you that restricting the matchmaker to team you up with another person, when multiple players are avoiding all different people, matching games together just gets harder - and that difficulty for the matchmaker makes the queues longer. Don’t be a dummy.