In Western Media we often see the average Soviet soldier as severely under trained, under supplied, and just generally not at all bright. So a couple of questions regarding such:
Thanks in advance for any answers!
Ah, the popular view of the Red Army; questions along these lines pop up every now and then.
You'll be most interested in u/Georgy_K_Zhukov's answer on blocking detachments, which also addresses several other matters along the way - namely, your question 2 and part of your question 3. The remainder of your question 3 is addressed in this answer regarding 'human wave' attacks, also by Zhukov, including his reply to a question beneath. For your question 1, u/kieslowskifan covers training in this answer.