Go to Costco.
Jeans down the best chicken schnitzel I have ever had outside a restaurant.
Failing that, start off by emptying that packet of breadcrumbs into the food waste bin. Bought breadcrumbs are uniformly ghastly. Instead use either coarse matzo meal (if you're going to fry) or crushed cornflakes (if you're going to oven bake).
Tenderise some skinless breast fillets with a meat hammer. If you don't have a meat hammer, put one fillet at a time in a large sandwich bag and beat it thin with a rolling pin.
Dust both sides of the beaten fillet with flour, or dip each side in a plate of flour and dust the excess off.
Put beaten eggs in one shallow bowl or baking tray, and matzo meal or cornflakes in another. Dip each floured schnitzel in egg to coat both sides, let it drain off, then dip it in the matzo meal or cornflakes.
If frying, lay it gently in the hot oil and fry on both sides until cooked. Sorry, don't remember how long, because I haven't cooked them this way for years. Drain on crumpled up kitchen roll.
If baking, lay them on a greased baking tray and roast at about 200C for about 20mins, turning over after about 15mins.
Or buy them from Costco.