The point is that you do not rely on them. They are an useful addition to your infantry (which you don't see much of these days - I tend to see a lot of tanks and veterans) but not mandatory.
Also one of the few rules of 40k: "If you have to rely on a a single dice roll, you already messed up"
Consider trying some new tactics. It sounds like your issues involve the random bs like warp storms, ever tried infiltration spam with Huron and cypher to infiltrate 3 chosen (fun way to introduce your opponent to 5 meltaguns, plasma guns, or flamers, 6if the champ takes a combi) and 1-3 obliterator squads (let's them skip deepstrike)
I just put down my Tau after 2 solid years of tournament play with them. My recommendation is to start by going all spring break and try everything. Barrow models and play a game with every army you can. So far I have run Necrons, Tyranids, Chaos Marines and I am looking forward to a game with Sisters of Battle. Each of these games has made me revitalized and I am looking forward to a new ITC season with a great Ork army.