This is incredible after waiting couple of minutes some of the players simple not lock in. And this is happening all the time maybe 1 of 4 matches are succesfull to start only. Please derank everyone who does not lock in.
If someone will not lock in during competetive, match will not start and all the players will be forced to search for new match. So there should be penalty for it.
That’s not how it works. Locking in merely acts as a “ready up” which will reduce the waiting time in the lobby and the warmup period in-game. It has absolutely nothing to do with the game starting or not.
Games will never start, regardless of people being locked in, if the text at the bottom of the lobby states "Waiting for players to connect … "
no. there are 5vs5 connected players. There is message
“waiting for players to LOCK IN”
if someone is not locked in, we are forced to MAIN MENU.
this is for competetive mode nut pub.
Again. That’s not how it works. I’m elite, I have my fair share of competitive games. Pay more attention next time. The second it says “waiting for players to lock in” the game will start regardless of how many players are locked in, or even, if players choose to leave the lobby and it resulting in an uneven match.
no. you are wrong no matter elite you are. In pub competetive mode if someone (more than 1) is not locked in ,game will force players to main menu so we have to start search for match again with different people. And this is happening all the time, most of the matches.
People even write to chat
LOCK IN PLS etc
Sigh. Believe whatever you want mate. People lock in order not to have wait out the full 1 minute and 20 seconds of wait time during the lobby. It makes no difference. Play more games.
Here’s an example even, http://www.twitch.tv/lightningzor/b/680066398?t=157m
Notice how adeto never locks in? Oh shi- game still started. What’s this sorcery?
2:37:10 if the timestamp didn’t work.
lol
okey just join pub competetive and see for yourself if someone will not click on that tiny button called Lock In 
Fubar is correct. Everyone locking in only speeds up the transition from the lobby to the match screen where everyone can then ready up (which further skips to the main game). Not locking in does not, or at least should not by design, send you to the main menu.
However, how something is supposed to be working and how it is working might be two different things. It’s possible that the OP is experiencing a bug with MM.