My experience on playing league on a new account (Gold 5 on main, started a fresh new account)
Basically a friend of mine and i wanted to make smurf accounts so we could go into ranked together and see how placements and all that would go. Now keep in mind, i haven't played from 1-30 since my main got their 3 years ago. What we encountered was shocking to say the least... After we had reached level 3, we went into a normals game, not too long after we noticed something pretty obvious. The enemy was way higher than anyone of that level (3-12) and were smurfs. Secondly, we must have forgot how things like runes and mastery costed when your a low level, we found ourselves debating if we should get the 450 champs or buy runes.
We played until level 7 and hit a huge breaking point... We were getting team members that were legit low leveled players, however almost always the whole other team would be smurfs and ranged from level 16-30. I don't know what their matchmaking is based off at riot but i'm certain that level 7's shouldn't be fighting such high level players who have access to more runes and champions. And thats where we found that we were more frustrated than enjoying the game, keep in mind my friend is a diamond 4 and we both had trouble carrying the game due to most of our team not knowing what they are doing (which is expected) and the enemy team having golds and higher skill level.
Runes and Masteries were horrible the first time around, but playing through this game again at a low level seems... ridicules. I felt smurfing would give me and my friend a chance to duo with each other on new accounts and even if we got nowhere it would still be fun to duo queue. However i never realized how many others are actually doing this. I thought just how bad must the new players have it? if 2 experienced players are having problems winning a game in norms, how would the others who are just playing the game for the first time feeling? they get stomped and wonder if they just suck because the guy who is seemingly the same level is so much better.
After seeing this, i think Riot needs to give runes and masteries at level 1 to all players. Runes can mean a lot in a game, yet it will probably take players til level 30 to even get all the tier 3 runes they need. iv never felt masteries gave me that much accomplishment in league every level, you level up and say oh... cool? and put one in whatever skill you want and thats it...

