Two things....

One, nerf Thunderlord's Decree. This isn't League of Legends anymore it is league of thunderlord's and you can't even experiment. Sure you occasionally beat a full team of Thunderlord's but if they have any ounce of brain cells, they will beat you. Nerf it.

Second, your normal pick be it draft or blind needs a new way to find opponents. No reason for my team to have Silvers and one unranked in it facing off against golds, plats, and a diamond. Happened multiple times and it's quite frustrating especially when you do nothing to provoke them and all they do is bm, spam laugh, and do everything possible just to taunt. Fix it. Don't expect a bunch of low elos to be able to match skills with high elos who just come just to blow up people because they can't win in their own elo. We already deal with that problem in ranked with smurfs. Get to it Riot. You got some work to do.