And that 4MB is 1MB of transactional data space, and 3MB of segwit data space, the latter of which is mostly reserved for future use.
So don't mislead others into thinking that all of a sudden we will get a 4 fold increase in transactional capacity. We won't.
In theory you can get up to 14 TPS with Segwit. However, with realistic usage that is not the case (similarly with the current network having a theoretical capacity of 7 TPS). Segwit will definitely deliver >2 MB according to the latest usage patterns.
segwit is not the compromise
It is.
activating segwit solves nothing.
It does.
because even after activation segwit will still be contending against native key users
Nobody cares. You can't DOS the network with "native" keys post Segwit.
segwit also turns into a 2 tier network of upstream 'filters' and downstream nodes. rather than a equal network of nodes that all agree on the same thing.
This is only the case if the majority of nodes don't support Segwit. Ironically to your statement, the big majority is in favor of Segwit.