Does riot give you bad teams during promos?

Does riot give you players with a history of doing bad/trolling/going afk in promos? Games: 1. Had 3 people go afk while winning. 2. Jungle forgot smite 3. Bot lane fed and then gave up and flamed. 4. Fine other than 2 Smurf’s on enemy team. 5. Jungle Olaf forgot runes, top forgot tunes. Is this bad luck or the system?
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