It's not really a simple thing, I think the problem is that people would prefer a simplistic answer to why Pochettino hasn't won a trophy at Spurs. It's very easy to just say it's down to 'bottling' and that's all, no need for any genuine analysis of his situation at Spurs or the constraints he's under, because he's a bottler right? I don't think a discussion should need to be heated and Pochettino's work at Tottenham isn't something that can be summarised in a couple of lines, imo.
We've had 2 CL exits, one where we were just terrible in the group stages and clearly weren't ready yet, and another where we went out to one of Europe's best teams. Sure we led the tie, but Juventus have serious quality and an ability to do what they did to any team, they did it to Madrid in the second leg. We actually went 2-0 down and were sunk early, but fought back and got the lead, Juventus were just incredibly clinical and showed why they're considered an elite side, that's all. This season we were written off from making it to the CL knockouts but hey, we fought back and got there .. still bottlers right? We led United 1-0 in the cup and lost 2-1, but the year before Chelsea were the only side to take the lead, so where are all these exits where we've been clearly on top? We won the first leg vs Chelsea this season but had our spine torn out for the second leg, so hardly a surprise.
This is just the narrative you're running with. People don't say shit when we come good in pressure situations because it doesn't suit their agenda. In the CL we needed 6 points out of 6 from Inter and PSV and grabbed two late wins, then fought back to earn a point at the Nou Camp. The season before top 4 was under serious threat and we won 3-1 at Stamford Bridge for the first time in forever. We've had plenty of situations where the pressure has been on and we've come through, but nobody cares about these, just the couple of times we've lost when idiots talk about us contending for the title.
Look, you can put it down to our mentality or whatever, that's your choice. I just think that's a really lazy analysis that leaves no room whatsoever for discussion and is nothing more than a dull cliche. In my view, it's far more fruitful to look at what clubs have won league titles and cups, and how they've won it (by spending shit tons of money) and looking at what is missing at Spurs which has prevented us from taking that next step. My view is that Pochettino has seriously overachieved with us, done what nobody would have predicted when he took charge, and yet is getting criticised for not achieving miracles.