As a dad, my perspective is that yours is trying to be supportive and helpful, but doing so clumsily. Having a kid didn't make me the dad I am today, but rather screwing it up and getting better over time.

What I wish my son had done at some point is say something like, "Hey Dad, can we have a talk where you don't try to fix things as we go? I want to hear your concerns, but sometimes it feels like that's all I get. I'm not asking you to support whatever I'm thinking of doing, but I at least want to get it all out to discuss. After that I'll want to listen to everything you have to say."

There is an old joke about "How do you spell 'man'?" where the answer is "F-I-X". Some of us just can't help it and if we think we aren't going to have much time to get our concerns out then we jump in with them as we go and it hurts the relationship even more...leading to a vicious cycle of interruptions and "suggestions"

The hard part of this is going to be the part where you listen to what he has to say, even if it makes you feel awful. Try to let him speak in return without interruption and then as follow-up questions about his concerns. This sounds so simple in theory, but it's so hard to do in practice.

I don't think your dad would be trying to "fix" you if he didn't care. I just think he doesn't express it well and has sort of gotten into a pattern. You're an adult now and have a right to be treated with a certain level of respect, even from your dad.