it is just a video game ...even in ranked
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If you don't like how normal random people play don't play with random people
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yes there will be immature uncivilized players who have nothing better to do with their time other than intentionally ruining others games .You need to learn to just ignore them realize they will cost you games at times if you choose to play solo que that is one of the inherent risks as well
So really given both those points...........you only have yourself to blame if you feel your time is being wasted and you still join a solo que.
the only one being selfish is you for expecting others to see the game as you do.
Find people who think like you and form a premade if you don't like it.