We've massively struggled against sides like Watford, West Ham, Palace, West Brom etc. We lack quality, leadership and experience all over the pitch.
Even from the 13/14 season we've lost more or less the whole team that nearly won us the league - Johnson, Agger, Gerrard, Suarez, Sterling all gone - Flanagan hasn't been fit enough to start a game in a year and a half, Sturridge is crocked and now Henderson looks like he could be following the same route. That's a lot of experience and quality that we don't have on the pitch anymore. Doesn't help that we've signed a whole bucket of shit in the last couple of years.
We've already shown signs that we can be very dangerous under Klopp - City & Soton away etc. Next season is the litmus test for him. The summer will be huge for us and I'm expecting plenty more games like today before the season is out as our side just isn't good enough - we are jam packed with average, inconsistent players.
Pochettino has made Spurs title contenders in the space of a year and a bit. Rodgers went from 7th to 2nd (and very nearly 1st). It's not called an 'absolute miracle', it's called good coaching and shrewd buying.