I agree. Don't like it with that trigger exposed. I do like nylon holsters; I'm usually pretty warm and don't care for a big swatch of thick leather pressed up against me. I have DeSantis Tuck This II for both my carry guns and really dig them.
Yeah way too much exposed for my liking. If I can get a pen(or finger) in the side of a holster and reach the trigger I feel it's too exposed. Too much chance on it getting caught on something and ruining my day. Or worse someone else's.
Get rid of that cheapo holster ASAP. If you must keep that Tore-Ass, at least find a decent holster to carry it in. Don Hume makes good stuff inexpensive. Gould & Goodrich too.