Whilst its great to say you face the machine at 80 plus mph it doesn't do you many favours.
Yes, you can groove a shot and increase the pace to the point where it becomes muscle memory but the real hard work comes from facing slower deliveries. You need a good head behing the machine also that understands what needs to be worked on.
Waiting for the ball is the hard part as im sure you have a decent array of shots but if you want to use the bowling machine as a tool to improve rather than an excuse to hit a ball being fired onto a bat then start at 60mph and then drop it down to say 45mph and work on the same shots. Have patience and the cliched play every ball on its merits come to mind... but its true and you'll gain a lot more playing shots at lower speeds as im sure that not everyone in your league is clocking 70plus!
I'm not sure about the Ricky Ponting statement but i do know that some of the Surrey lads didn't put the machine above 75mph and would train on shots often a lot lower than that.
As for your form, take a little heart in the saying form is temporary class is permanent. A lot of batsmen this year have suffered yet i have noticed its the more patient often older players that have carried the innings for the rest of my team as an example. Give yourself a chance as most of the issues will be down to confidence and feeling you are out before you are even faced a ball.
Just approach your next net session like the start of an innings and train the way you would like to play.
If you have the bowling machine to hand, set off in 5 over bursts at say 55mph with gentle away swing. Just watch the ball, even repeat it out loud if it helps keep things simple. Dont try and take the cover off it as you are only 5 overs into your game just protect your wicket and if a bad delivery goes down with any width... wait for it to come into YOUR area and drive the ball along the ground.
Continue working in 5 overs bursts and replicate what you may face at a weekend, even if that means dropping some 35mph looping moon balls 30 overs in. But be patient, give yourself a chance and try to just build confidence by protecting those stumps behind you and playing the least risky shot... you cannot get caught hitting along the floor!
I'm sure you'd take a score of 40 odd with boring shots right now but it would give you the base to know that you are capable of old for you just need to give yourself the time and a chance to do it again.
Apologies for the waffle but i hope any of that may help.
See ball, hit ball...fly