Nope. You would have said the same thing about him going when the spotlight would have been on him and his relationship with the Bushs. Good and respectful move by Trump to avoid any of that. Garbage opinion but hardly a surprise.
In this case I think Trump was between a rock and a hard place. It is true other presidents have not gone to a former 1st ladies funeral. Others have gone so the protocol would be it is optional. I have no issue with him not going. His reasoning is BS though. I don't blame him for making an excuse, I just don't buy it. He had to give a reason and the truth is, he didn't get along with the Bushes and has been derogatory towards them. To "show respect" at this stage would be meaningless. But for a person who his admirers claims "tells it like it is", I don't think he did. with him always being honest and straightforward, I would have expected him to say "In light of Mrs. Bush's opinion of me, and mine of her and her husband and sons, I didn't feel attending was the right thing to do. "