Why do you think Schmidt is doing a bad job? Name a coach who'd do the job better.
Schmidt didn't ruin a near certain try by running in front of Rory Best from a maul 2 metres from the line. Schmidt didn't have a kick blocked down at the end to kill the game. Schmidt didn't knock the ball on less than 5 metres from the line from a charged down kick. Players have to take responsibility. Ireland have beaten New Zealand, Australia and South Africa within the last calendar year. To say that's getting progressively worse is farcical. You're not giving Wales or Scotland the credit they deserve.
If there's a coach who's not performing up to the task at the moment, it's Andy Farrell. While not giving away many penalties denies opponents kickable penalties and is to be commended, Ireland are conceding a massive number of tries.
I do believe mistakes have been made by the head coach (the selection of Rob Kearney, Tommy Bowe, Sean O'Brien and Keith Earls of late for example) but he has enough recent credit in the bank to more than make up for it.