MMR Rating for Solo

Still trying to raise my Solo MMR, I sadly dropped from grace and am trying to get back to 4k.
Last night had two games both lost because my team fed or they picked all carrys and I lone support in both game was blamed. We also had a magina raging on us so that didn't help either. Should I just go Natures offlane from now on?

I see a lot of people talking about playing 2 or 3 heros, laning mid or going jungle... this was a 5 players game.

'was' anywho it doesn't matter anymore mmr is meaningless since it doesn't measure what it claims.

It measure where you are approximately, not how well you play. It's not meaningless, it's meaningless for those who dont understand the function of what MMR tells you.

I don't play a lot of solo ranked, but when i do, i pick Storm Spirit or Ember Spirit and just snowball the **** ouf ot everything.

All you need is a dominant midgame hero that can snowball like crazy. Preferrably with high mobility.

Other heroes in that area would be Slark or Queen of Pain!

PS: a friend of mine went up to 6.1k rating by only and only ninjapicking Xin and kicking some midlane ***.

To some extent yes, but I've been paired with nothing but random people all picking carrys or mexican players that don't understand team work. I've even had an occasion of an opponent saying they feel sorry for me being paired with these people.

Well obviously to some extent, that's why i said approximately... Everyone has that no matter what your rating is. I've been paired where everyone picks a middle or a carry and i end up playing support, which i dont mind because i will do what is necessary to win. Everyone has probably received that comment before where the opposing player feels sorry for you. Just deal with it, you're down there for a reason, play support if you have to. If you don't, then learn and create space as a support if everyone is picking mid/carry.

I just don't see or notice a difference when I was 3200mmr and when I was 2800 mmr.

Then stop trying to blame others for the reason your there and improve yourself. If you fail to improve your self then you wont get anywhere.