Nervous editing, takes the fun away and stifles creativity

I've been a Vegas Pro user for over 20 years and could never imagine leaving it behind.
After experimenting a little with the free version of DR I was blown away enough to buy it.
I did a few projects with a few little niggles which I thought was because I was new to the program and needed to learn more about it.
I watched some amazing tutorials on YT and was excited to try out the animation possibilities in Fusion and colour grading etc.
Anyway, to the point.
I've already posted in another thread about getting black clips and nothing works on the timeline (not even the space bar) and I eventually gave up on a day's work and started again.
It took me a few hours to get to the stage where I was before the crash.
I had 4 clips of 2 and 3 minutes each, 2 angles of each clip using a 5D and a Hero 8.
I have one shot as pic-in-pic in the corner of the main image and no cuts or edits. (on both clips)
I'm using a simple timer (text+ with time code) and a couple of simple Fusion titles. (same title with different text in the 2 different clips.
This should have taken an hour so to put together. It took me half a day. So many crashes, freezes with no indication of what was going wrong.
I eventually managed to get my edit as I wanted it after having to open the multicam in a timeline, selecting everything and copying it to another timeline, because that's the only way it would play properly.
I went to the Deliver page and the "add to render queue" was greyed out. That took another few hours of Googling and trying different things, many restarts and reboots etc.
I had a timeline that was playing as it should (apart from some lag, but I can live with that) but I couldn't render it.
I had to open another timeline, again copy and paste all the clips and then go to the Deliver page. I finally managed to render it.
I have been saving my projects for the past day with "save as" every time, so as not to lose too much work if everything blocks like last time.
Every time I go to the Fusion page I'm nervous that something will block my project.
Is everyone here having an enjoyable, stress-free experience with DR?
So far it's making me pull my hair out.
After experimenting a little with the free version of DR I was blown away enough to buy it.
I did a few projects with a few little niggles which I thought was because I was new to the program and needed to learn more about it.
I watched some amazing tutorials on YT and was excited to try out the animation possibilities in Fusion and colour grading etc.
Anyway, to the point.
I've already posted in another thread about getting black clips and nothing works on the timeline (not even the space bar) and I eventually gave up on a day's work and started again.
It took me a few hours to get to the stage where I was before the crash.
I had 4 clips of 2 and 3 minutes each, 2 angles of each clip using a 5D and a Hero 8.
I have one shot as pic-in-pic in the corner of the main image and no cuts or edits. (on both clips)
I'm using a simple timer (text+ with time code) and a couple of simple Fusion titles. (same title with different text in the 2 different clips.
This should have taken an hour so to put together. It took me half a day. So many crashes, freezes with no indication of what was going wrong.
I eventually managed to get my edit as I wanted it after having to open the multicam in a timeline, selecting everything and copying it to another timeline, because that's the only way it would play properly.
I went to the Deliver page and the "add to render queue" was greyed out. That took another few hours of Googling and trying different things, many restarts and reboots etc.
I had a timeline that was playing as it should (apart from some lag, but I can live with that) but I couldn't render it.
I had to open another timeline, again copy and paste all the clips and then go to the Deliver page. I finally managed to render it.
I have been saving my projects for the past day with "save as" every time, so as not to lose too much work if everything blocks like last time.
Every time I go to the Fusion page I'm nervous that something will block my project.
Is everyone here having an enjoyable, stress-free experience with DR?
So far it's making me pull my hair out.