Bottom layers density

Hi everyone,
Anyone knows why bottom layers are so "loose" (like on my pic)?
Even if I use supports then first layers looks so bad.

I think it looks normal… The head is moving faster to only have minimal contact to the raft (…to be able to remove it)

After hitting it with a flame (or heat gun) it usually looks a bit better.

Yes I agree, this looks pretty normal for the layers pointing downwards. If possible print your parts with the A surfaces (surfaces you see or interact with) pointing upwards. It actually looks like your part should be printed on it's side. This would give you a good flat face to peel the raft off and really nice side walls.