Premades are a cancer in unranked bgs. People are either being complicit by being making a defeatist comment or deflecting (making it about losing or jealousy). The latter either ignorant on the matter or participating in the practice without wanting to admit it (because they know it is unethical).
There is a precedent here with how most of multi boxing mainly ceased as a practice after Blizzard ruled third party apps syncing inputs are not allowed. Same argument can be used with premades since they mainly use 3rd party apps to queue dodge by showing them their opponents name (10-40 people) which is not available in the Blizzard UI. When the queue pops and if they recognize an opponent's name (e.g. another known premade player) they will queue dodge since they'll be fighting an equally organized group which is undesirable since they can't assure a win. So the entire group will drop queue and requeue until they are matched with a ragtag group of players looking for a fair game.
Venruki made a video about this a few months ago as well.
https://www.youtube.com/watch?v=P8ONdxmv_7Q
- - - Updated - - -
That is not a valid argument since you can queue with 5 of your friends and guild. Queueing with your friends and guild is an organized group and wanting to queue with an entire organized team which will very likely be using Discord vs an entire team of randoms using in game is unfair.
Additionally, these premades can make their own underground community with their 3rd party apps so they are only matched with other unranked friends/guild groups which is not happening. What is happening is these friends/guild groups are instigating unethical games with randoms for free wins.