There's no solution, realistically. Competitive has been a in bad place for months, if not longer, since the player base isn't large enough to create good matches. I think when 343 moved on from H5 the hope was that Infinite would be out by the end of the year, but obviously Infinite isn't coming out anytime soon. Unfortunately, that's left players in a pretty rough spot. Maybe MCC still works for fans, though, I haven't really tried it.
You could probably even quantify this by comparing average intra-match variance in MMR across all players at launch, half-life and at current state. I'm sure MMR variance has skyrocketed since you'll regularly see onyx/champs and plat/golds getting lumped together. The matchmaking system's doing the best it can--but there's no solution here.
Comments that say "You should be with a team if you want to play competitive" feel disingenuous . Obviously, ranked Halo is not designed to be exclusively played with fireteams. It never has been. The issue isn't that folks can't get call-outs and coordinate when they're not in a fireteam, the issue is that people not in a fireteam are getting matched with wildly uneven players because the player base is too small to create reasonable matches. Or is someone going to argue that a 343 monitor would ever have responded to this thread with "Get a team next time" when the game was launched?
Getting a team has always been the reply though. Your team mates are called "randoms" for more than 1 reason. They are a random variable in your match. From who they are, their skill level, to even where they are on the globe...the variables are only exacerbated with a low population...but in a high population game...sure..there will be fairer matches more often..but if you're trying to argue that getting a team still isn't the best advice to give to a solo player...you're just flat out wrong man.
Can you play the game as a solo player? Sure. Is playing with a team better? Yes. Objectively better. This is not up for debate. It's not even an opinion. It's a fact.
Playing with a team...it makes such a significant difference. People who you're comfortable with...people that become your friends. This goes beyond the scope of just "being competitive" ..it's a video game after all...and look how much it stresses people that play alone? We get bad match ups when we are teamed up too...it isn't exclusively a solo player problem, but they are affected to a higher degree, and have less chance to survive those horrific match ups that aren't in their teams favor.
I've played halo 5 off and on. When I have people to play with, I love this game. I started out as a solo player...but the game is just SO much more fun with friends...all I do is play ranked arena...so it's not that I'm playing all these social modes..I play the sweat fest matches sometimes, and playing with a cool group of people is an awesome experience. A few months ago I rage uninstalled this game. Prior to that I played it non stop until everyone was playing rainbow 6.
Coming to these forums saved halo for me, because I was beyond frustrated as a solo player. The solo Q playlist also gives me bad matches...so I looked for people here. I made threads, answered threads, friends became friends of friends, and suddenly there's people on my friend roster. I joined a spartan company but I don't even play with the people there. They don't even respond to invites. It's the lone wolves I met in the recruitment thread that have stuck together. We have fun each time we're on...and that's what playing a game is all about. If the fun is gone...and you are powerless to change that...why continue?
So yea. Find people to play with. The team becomes your friends. The only thing better than playing halo...is playing it with other people. At the end of the day...yes. halo 5 has problems ranging from its population, to it's servers....but don't criticize someone for giving the best advice you can give someone. It's the same advice that would have been given at launch as It is now....what else could you possibly say to someone who makes a threads about bad team mates in match making? You do realize that people have made that same complaint this games entire life cycle right?
"Bad team mates"
"I carry everyone but lose the match still while Tommy no thumbs goes -15, why is he ranked higher than me?"
Those aren't incidents that didn't exist before. When the population was higher and the forums were more active...trust me...those threads came up.