I think you overstate your case sir, but yes, the TT is very frustrating. The one over on V3 is much improved and allows you to practice unrated on puzzles you've missed. Also no more lost points for correct answers; you may not gain any if you take too long, but you'll no longer lose points either.
Tactics "ranking" is the stupidest system every created.
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You get the first move wrong, lose 10 or more rank. I FINALLY get a SINGLE tactics correct and what do I get? 5. it's completely unbalanced. all I have done since getting this app is lose tactics rank while all my other ranks go up. when will this useless system be fixed? It's impossible to go forward unless you're cheating or a genius.