Hi KT, welcome.
Are you using the overpass on Seaford Rd, a bit further up from Kananook) or the Klauer St one, right after the station? If it's the latter, I know that overpass well, it's on my daily commute (the left turn traffic actually goes onto Wells Rd, not the freeway
). If you're going straight ahead, use the straight ahead lane, not the turning lane, but stay to the left side of the lane so traffic can still pass. Generally I find the only drivers who get ticked off are the ones who can't enter the turning lane correctly at the bottom of the overpass, instead cutting in at the last moment. It can be a little unnerving at first having traffic coming up on your left side, but using the correct lane for your direction of travel is the safest thing to do. If you are using Seaford Rd, you're probably better using Klauer St then turning left into Hartnett Dve.
As for turning right, it depends to an extent on the intersection. On busier ones you're better off doing a hook turn, which is legal for bikes anywhere. Begin crossing the intersection, but pull off to the left, in front of any waiting traffic, then when the lights go green (if applicable) for the direction you wish to go, away you go. If there are no lights, same deal, but proceed when safe. If a hook turn isn't an option, be assertive. Look behind you, not only to ensure you've got a gap, but also to give a signal to any motorist approaching from behind that you're intending to move across. Be emphatic with your hand signal; I raise my arm from the elbow first, then fully extend it rapidly. It's a kind of "I AM going there, give me space!" gesture. If you can safely accomplish it, continue looking back over your shoulder while you signal & move right to position yourself for the turn. This will take practice, so find a quiet place to learn how to hold course while you're looking another way.
There will always be some prats out there who will be annoyed at you purely for the sake of it, but if you're clear and predictable in your intentions & actions, the majority of drivers will actually do the right thing by you.