I just took my first flight on this battery and checked the balance port right after flight.
5 cells are at like 3.55 and 1 cell is down to 3.3
Is that bad or is it normal.
I mean I didnt even really punch it only once like slightly.

If your charger supports internal resistance measurements (IR) then its best making a note when you get a new lipo as over time this will help you understand if the cells are depcrciating over time in terms of their ability to hold charge etc.

Most FPV lipo packs are not built for space missions and there is no protection circuits to manage the cells discharge etc. Even the quality of the cells used is usually in the ball park although there are rumours that the quality lipo manufacturers make a pack using cells which have a very similar IR etc but based on the quality control we see in the hobby I am skeptical about such claims.

Don't loose your sleep over it, just keep an eye on that cell over the next few flights and charge cycles.

What to say. Its pretty common.

The lower the pack voltage, the more 1 cell is going to show lower than other.
Thats why you should not push below 3.6V.

After 20+ flights, it will be big difference.
Funny enough I have a pack that has progressively shorter flight time.
Was charged last night. Now its sitting on my desk. 3 cells 3.85V. 4th cell 0.7V.
So, its either garbage or cut it off and turn it into 3cell pack.

The 4th cell at 0.7V is alarming to me.

Yeah, FYI.
Once they go below 3.5V is bad.
Below 3.0V is dangerous garbage.

NEVER try to charge or use such a battery.