Anyone else think the difficulty curve is too steep from tier 4 on?

My old account had about 6,000 battles, but I couldn't realistically play past tier 4. The level of difficulty goes to 11. A training mode would be really helpful at tier 4 or 5 to understand the mechanics. Also, MM goes completely bonkers. My KV-85 always got scout MM and was always bottom tier against tier 8's and 9's. There really needs to be an option for single-tier games or an off-line single-player training mode to teach techniques for each tank.