Alright, I'll give a few opinions here. I'm currently Plat 5, planning on just holding there until preseason where I plan to push to diamond. Honestly thou, anyone above G5 would probably be of help. The difference between mid - high gold, and mid - high plat isn't that big.
Bronze 3, so no matter how good you are, you're going to be stuck having to deal with your team also. This aspect is kind of grind based, you'll either get really lucky and get teams that know what they're doing, or you'll get everyone else. Seem to main support, or at least Morgana support. Few things:
KDA: It's not bad. I think you want AT LEAST a 3.0 KDA. I'd still suggest working on that, trying to get it up to 3.5 - 4. This could mean roaming more, having good timing, or being more cautious.
Build: Again, playstyle dictates a lot in a game, I know my style doesn't suit everyone. That being said, it seems like you play incredibly agressively with your builds. I'm seeing Zhonyas, Rabadons, and even stuff like Frost Queens. It's not that these items are in anyway bad on Morgana, or the support role, just kind of inefficient. Incredibly high cost, for a relatively low output, espc. on a supports salary. I'd suggest items like Zeke's Herald, Banner of Command, Talisman of Ascension, which tend to give respectable combat stats to your allies as well as being useful for you.
Honestly, support tends to be a hard lane to carry from. It's 50/50 on the adc. A good adc can carry a bad support, and vice versa. You are holding a +50% win rate, which is good. Other things, less gameplay related, but still important.
- Don't rage. Ever. idc if there's an 0-20 disco nunu in base, raging in game doesn't help you win. After the game is over, then rage all you want.
- Duo with someone. They don't have to be amazing, or carry every game. You just need someone who isn't going to rage, and if possible, someone who isn't going to hardcore feed.