What the heck do individual game analysis ratings mean?!

I would really appreciate any insight I can get into the ratings that the analysis engine gives for individual games.  I am feeling extremely frustrated because I am losing nearly every (rapid) matchmaking game that I get paired into, and when I dutifully go to analyze my losses, each and every one of these 1020-60 rated people I am paired with are turning in games rated 1300-1400.  Meanwhile, consistent with my own overall rating, my gameplay usually gets scored 1000-1050.  I would think that if I am playing against people in the 1000-1050 range, an in-game skill of 1000-1050 should be good enough for a win at least some percentage of the time, right?

I have read posts saying "oh, there are cheaters and sandbaggers operating around this rating level" and I get that, but it can't be every single person I get matched with right?  I am seriously considering to set my custom game filter to exclude anyone ranked at all higher than me so I have more chance of playing 900 rated players against whom I might have a chance, but somehow that move felt unsporting, so I wanted to post this and get feedback first.  I am not a 1300 level player and I am not likely to become one, so I just want to play at an appropriate, sporting level and not get destroyed every time.  I hate how once I drop into the 1020-30 range, suddenly I encounter a run of terrible players who resign early and suddenly my rating boosts again up to 1040 and again the cycle of being killed by people suddenly with 1400 games begins again.

That value is just an estimate of the play based on the player ratings and their associated accuracies. It's not really accurate and should be taken with a grain of salt.

Thanks for confirming this, so in this case finding the actual rating level where my skill is at and playing folks in that pool sounds like the way to go, because my actual rating feels way inflated and seems like I'll need to manually go accept games only with lower rated players where the challenge for me will be more equal. I just want to play within my "class" so to speak, and I feel the automatic matchmaking has just gotten worse and worse the higher my rating gets. Like I'm rated 1050ish and it has been at least 3 weeks if not a month since I got matched with someone below 1000, even though I set my filter to -200 as the lower range of rating.

If you're playing rated games your actual rating will reflect your performance in the pool. Most of the time the system is going try to pair you with someone close you your rating but shouldn't exceed the rating parameters.

Yeah man I wouldn't fret too hard about it. It's a fictional ELO that Chess.com made that is meant to rate your play in a game based on likelihood of winning loosing or drawing. The winner will always have a higher ranked game rating. 
For example: my game rating for a win I just had was 1400. My elo is ~610 and my opponents was ~620 lol. Its just some made up formula.