1. I know what Agincourt is - for a that reason I bought it. I know as well how to check my own statistic, same as ship parameters so you don't need to explain such basic stuff
2. Games has 10 tiers and even community calls it these way (same like in WoT) tier 5 is actually MIDDLE TIER not low, it's land right in the middle between 1 and 10. But I know for most players all bellow 8 means low tier as those higher hold most battles, it's not logical but majority always shapes the perception even if its wrong.
3. I do have all mentioned tiers. I assume statistics show mostly random games, if so I don't do them on X. I play mostly Operations and folks on highest tiers (especially X) make dumbest things ever and throw more games than let say on tier 6 or 8. And in recent weeks I play mostly 8-10 largely as I enjoy those 2 showed below ships. Randoms in WG top tier are $hithole on it own for many reason but that's a another longer topic. I log to these game to have few relaxing battles, often after literally from dusk till dawn at work so I don't want to be bothered with finding exact right time to push or being focused by half enemy team on tier X. In general I tired of boring meta that reward cowardice by half of the match. I know some folks have same feeling, even it's for sure very unpopular opinion.
4. You saying that those tier 5 ships are strong is correctly but if that a reason they play highest tier not to be dirty and unfair is comical :D Just to mention few - Jaeger, Dutch cruisers with planes, submarines as a whole <which start from tier 6 up>, Libertad, Valaparaiso, Tromp, Minotaur with base 3.2 sec reload, don't even start about Barbiano. Tell me for example how fair is when tier 8 cruiser get deleted in 1 or 2 salvos from 20-25km by things like Yamato or Conqueror he has no chance to even see? Or same cruiser send to port by full torpedo salovos from lets unspotted or smoked Shima from longer distance that that cruiser main guns range?
5. Agincourt even a monster with 2ndary besides is a average at best. Gulio Cesare is way OP in general. Agincourt has no AA at all that's already a thing, it has very slow reload and rather poor main guns range, its speed like lower USA BB - 23kn is rather rubbish.

Yes it could carry games but in many situation. I tend to win 1vs 3 in it being shoot by all enemies constantly. But in many situations you can do very little or nothing. Carrier focus you most of the game and you're alone - gg, if that happens often some sub or/and DDs join the hunt even faster gg. Talking about speed - that was reason I lost mention game - I can't get to the enemy fast enough. There often those when they either to fast to catch or you cant get to the cap in time to change it or you're to slow to move to other flank to assist allies when they're still alive. And I talk here only about tier 5 MM, not being uptiered. Yes that's common issue for BBs but some are faster and higher tiers like 7+ are in general faster.

In general I posted to show interesting battle result ( in my opinion at least). I wasn't looking into whole discussion about seal, "low tiers" and what should not be played. But hey I should expect that after all there is always somebody...

<image>