Not blasphemy. God saves those who throw themselves on the mercy of the court, not those who appeal to works they have done.
You need to confess your sins. You will feel way better
The absolute worst Catholic bashers are fallen-away Catholics. They are all on a guilt trip so they constantly have to rant and rave and act like a little a little kid that can’t get his way. The Bible is very specific about the Holy Eucharist and anyone that wittingly makes fun of it, and knows better (like fallen-away Catholics), God will surely judge them when their time on this earth is done.
So instead of constantly trying to justify leaving the faith, why don’t you just let it go and quit making yourself look silly with your ignorance of scripture. If you are truly happy with your new faith, how about leaving those alone that are Catholic and proud of their faith. Show a little respect. That’s all anyone asks.