Hi, I agree that big all you can eat Lobster and crab places are just not that good.
If you must have lobster, then give Boston Lobster Feast or even Angel's (very poor reviews) a shot if you are into buffets and all you can eat.
Now if good snow crab is what you are seeking and could satisfy you then we have really enjoyed Crabby Joes in the Clarion on 192 between Formosa Gardens Blvd. and Old Lake Wilson Road. Not a real fancy place and not a "100 item buffet" but really fresh good crab legs, all the cold oysters on the half shell you can eat and some chicken, beef, and pasta offerings. About $25 dollars for adults...
Disney Cape May at Beach Club is big step up with all the mussels and steamed clams you can eat along with very good crab legs, excellent Mahi and many other beef, chicken, pasta, and salad offerings. Really good BBQ pork ribs, too. Beverage included for about $37 or so.
Good Luck...Ted