Oh dear...
Ok, re the ladies in the choir & their ability...I'm pretty sure the phrase is 'make a joyful noise unto the Lord' rather than tuneful...
it might niggle those who are pitch perfect but those who aren't are no less entitled to praise God, & I'm sure he is more interested in the sentiment than the harmonies. 
Re the older lady's comments re your child, I understand how stressful it can be trying to wrangle kids at church, & firmly believe we should follow Jesus' example & welcome kids...but as another pp said a good church will try & cater for the different approaches / needs of it's family members...but the oil that keeps the cogs turning is tolerance...which works both ways, so I can see how her reaction hurt you...but don't let that anger fester!
Try not to get side tracked by personality conflicts - ask God to help you see others as He does (their humanity, frailty, vulnerability) & with His love...& take this to him - if church is more than a sunday activity for you, pray about this. Human relationships are darn tricky, noone's perfect...
As for everyone saying what hypocrites Christians are...well, yes, some of us are...possibly all most at some point or other?
We are, after all, human, with all the annoying habits & baggage we had before becoming Christians, it's just that we have a faith & are on a journey with it...all at different points, some more saintly than others, none perfect.
. My big issues include swearing like a trooper still language, patience etc...I'm very much wip, but I do not (try not to!!) judge others...just plodding along my own path...
Right, shutting up & off soapbox now! 