Transmission Slipping When Warmed Up

I have a 2013 Ford Escape. Back in August (it was at approx 85k miles) I
was in an accident where many parts of the front suspension needed to be
repaired/replaced. The bulk of the damage was cosmetic but the major
impact was on the front passenger tire Wheel assembly and suspension.
During the accident my car sort of hopped like a rabbit when the wheel blew
and I was pinned up against the center divider and the other drivers car so
there was additional impact once I landed.

As you can see from the picture the wheel is slanted inward and turned
slightly. The remaining wheels on the car are pretty straight but this one is
where the impact occurred. During the course of repairs an alignment was
done and the mechanic said it came out fine.

When I got the car back it didnt drive the same and was slow to catch up.
Now, 4 months later my transmission is failing (at about 91k miles). It drives
for the first few miles on a cold start up but according to the mechanic and
insurance adjuster once the car warms up the transmission is slipping. The
night it quit on me I could hear a whining coming and very faint burning smell
from the hood but didnt know what it was; then bam slipped and wouldnt go
any more. Turn it off for a couple minutes and it would go for about 20 feet
and then again it would slip. When this is happening there is no reverse; it
just seems like it is stuck in neutral.

The insurance adjuster is claiming that this is happening due to normal wear
and tear. Something to do with worn down clutches. I never had a problem
with my scion and I sold it at 250k miles so this is new to me. But it is
possible that there was something wrong with the transmission when I got it
back from the mechanic and it just took this long to finally show its full
problem?