Here you are then.
1) The manager came in asking for specific players. He got none of them.
2) The manager has had to deal with a long-standing issue of dressing room hierarchy and a 'relaxed' mentality, neither of which are what he is about. That has taken the better part of 6 months to correct.
3) He would happily move on at least 7 of the current first-team squad, but due to previous 'high-wages' we are finding it hard to get people to buy these players. it isn't just the fee you ask, it's the wages they are on. This bottles up the squad in terms of what he really wants versus who he has.
4) He is determined to build a young side. It is why you have seen Mason and Bentaleb as the central midfield, and it is why Kane has been chosen above all upfront. It is why you saw Onuha make his debut last week and why a couple more will be seen in the first team squad before the season is done.
5) He has several players out right now for a variety of reasons.
6) Given that he is trying to work on systems and trying to put into place a lot of preparation, three games a week for X amount of weeks/months does not give him or the squad an ideal amount of time to work on things.
7) If you cannot see that he has absolutely tightened us up at the back, improved our focus over 95 minutes and instilled a late winning mentality in our play, then I would suggest you are extremely biased. It is undeniable.
8) Where he, and we, are suffering right now, is with lack of pace. We need more of it. He knows it and wants it.
9) Pochettino joined us in June. 8 months ago. As of now, despite having to go through all the work described above, we are still in three cup competitions and within touching distance of the top 4 (I don't think we will get it BTW).
I think when you balance the facts and put things into context (who, exactly, has he bought for any REAL money that he actually wanted?) it is hard to criticize him.