Difference in Normals and Ranked MMR when solo

Heya, I decided to make a "quick" post a few paragraphs long about the differences in matchmaking that I have noticed recently. If you see parentheses (These things) that means that while I was typing this I went on a mental side tangent.

I am gold 5 right now but I could probably climb to at LEAST gold 3 if I put in the time to solo que. (Yes I was helped getting into gold 5 by winning 4 games duo, and wear the boosted badge of shame when 98% of my ranked games this season have been solo, that aside...) I seem to get matched with and against higher ranked players when I solo normals than when I solo ranked, such as a recent game where I was playing with a diamond 5 Mundo top lane. (I didn't get a leash from him, but I still finished blue with 300 hp left... at 2:47...)

I also noticed that the rank spread of my opponents is much greater. It used to be only gold, silver, and the occasional bronze but in my last game I played against a diamond 5, a plat 3, a gold 5, a silver 5, and a bronze 1 player. That is basically high enough to be called pretty high rank, elo hell (It doesn't exist) and everything in between. (I think that it might have been 2 premades going against each other with me being sucked into that match as the filler.)

Admittedly I haven't played too much ranked recently because my main had his rework reverted making him a less able candidate for the jungle, but the last few ranked games I played everyone was within 5 divisions of each other. I am planning to make my main jungler with as a backup jungler with as my main top laner.

I do not see this happen much on my team or the enemy team when I am with a few friends.