My father died over a year ago and I'm currently being screwed in a similar fashion by my father's will and trust and depending on your opinion on various things more so than you. It still hasn't been distributed because of legal questions and for some reason went through months of probate despite being a trust.
I believe my father really screwed me by splinting his trust five ways, four ways to four step-children he knew only as adults, and one way to me, his only child after my sister died when she was 20.
One argument I'd have liked to have made is that in lieu of a will to the contrary, legally step-children, unless raised by the step-parent from childhood, aren't entitled to ANY inheritance. I assume this is due to a long tradition and is the proper etiquette for these situations. My father decided that these people, absolute strangers, and ass-kissing phonies to him, assholes to me, are equally deserving of not only his trust but my grandmother's. He well and truly believed these were his precious "children" who loved him like a father despite they have a wealthy living biological father still and they were more than happy to play along. Folks this is the way to get rich! Kiss an old man's ass and get put in his will.
Furthermore each and every one of these people is employed, two of them are wealthy (millions), while one is up and coming. They're all also home owners. These people don't need or I imagine will even notice or benefit much from this money. Meanwhile I have been disabled for over ten years, didn't do very well in life before that, live in an apartment, which my father was helping to pay for. I've been on the verge of homelessness for twenty years. I lived in my ex-girlfriend's parents' back bedroom for three years because neither of my parents would help me out and I'd gotten so bad I couldn't even talk to anyone.
Anyway, your situation is unfair. The step-children should at best be given a "windfall", but not a "trust fund". Say out of 2 million, $100,000 each. And the rest should go to you as the legal, blood heir, for what that's worth. You deserve your trust fund. Mine's currently 1/16th funded and I'm taking out the sustainable 3.2%, which is almost nothing. I intend to take out around 2.8% when it's fully funded to allow me to possibly purchase a home if any mortgage company will have me, but at least will keep me housed, fed and gas in my car while I try to deal with my mental problems and live some semblance of a life.
I'll never be happy those phonies got 4/5ths of my father's estate. After what they've done in the past year, lying and making decisions, promising things but failing, and then confronting me about my rudeness.
I've always been a teetotaler, one of the reasons my father still accepted me because he went to AA after my sister died and stayed sober for the rest of his life, and since he's been gone I've started drinking. Almost every night, just to deal with the unfairness, shame, helplessness and interminable waiting.
I was just crying and throwing things a minute ago because it looked for a couple weeks like my grandmother's trust would go to me, but after trying to confirm with the attorney he just told me that there was an amendment to my grandmother's will, and if my father didn't have the right to transfer her trust to his and distribute it five ways, then I might not get anything I guess, but he actually said he didn't know what they would do then.