Low Tier Gameplay

To mods: I don't know if I put the correct flair but if it's incorrect please remove the post.

So what do you guys think about lower tier gameplay? from 1-2 to 5.

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I just started a new line on the american TD's and I feel like the gameplay is not that great. I mostly find myself one-shoted by the lefh's or pzIVh or the teamates have no knowledge of the W key or the minimap. I mean I am used to bad teamates don't get me wrong but usually in higher tiers you can get away with it. Just carry harder right? At least that's the case when I find myself playing with people that are let's say less knowledgeable than me as far as WoT is concerned. Now I'm no Circon but I do alright for myself, try to help, follow the flow of battle. But since I started to again play low tiers because I was kind of bored of higher tier gameplay, but now I'm starting to miss it. I don't expect too much from people who just started playing, but in the post games I visit the profiles of some of the players and they have 30k+ battles and like 43% win rate. And they have like 5k battles in tier 3,4 or 5 and only like 300 in all other tiers. Anyway what I was wondering if any of you here have had a really bad experience with low tiers? And if you got any tips for the E3 TD line from t4 to t8 I'd love an opinion because I feel like sick when I see us lose 15:3 and all the kills are either mine or arty's.