Any bike racing and you will crash eventually. It’s important to analyze why you crashed and if you could have prevented it, for example was there wheel overlap, poor bike handling, clipped a pedal during a turn? Good bike handling skills and situation awareness are the best ways to avoid crashes. Also, being near the front of the pack in a crit is preferable than being in the back, as weird stuff happens in the back as folks get tried. Have a good road rash kit in your car as well for those aggressive club rides. Also, learn to fall off your bike, it’s always better to slide than got over the handle bars if you have an option.