I don't like many of those things, but many of those things are not illegal. Many were done by previous Presidents as well (that doesn't mean they're good, but it does mean they're not without President). None of them mean that Trump has escaped checks and balances in a way that seriously endangers the system.

For example, as far as I know the war is not technically illegal. And wars of this nature have been done by many previous Presidents.

I don't know why firing the FBI director would constitute getting past the system. Trump's the head of the executive branch after all.

Executive actions have been widely used by previous Presidents. Should they be more limited? I think so, if it was up to me I'd probably reduce the power of the Presidency in general. But Trump wouldn't be able to, for example, use an executive action to allow himself to run for a third term. If he tried, people would just laugh at him.

National Guard deployment in Los Angeles is within the President's normally agreed-on authority and did not lead to any sort of danger to democracy.

Etc.