Let's not kid ourselves, CoH3's launch is worse than CoH2, by far.
On a technical level, both games are/were pretty bad. Which one is better or worse is probably up to personal taste and another debate that has been fought multiple times by now, so I'm not going to re-re-reheat it.
Objectively, CoH3 is in a better technical state than CoH2 at launch. CoH didn't launch with the "battle servers" or whatever that made connections more stable and the quantity of crashes per time played was so incredibly higher in coh2 than in coh3. Also, CoH3 has great optimization going for it, unlike COH2, which still struggles to this day. I only heard of a few people with AMD GPUs having significant issues around launch, and that was fixed with an update post-coh3 launch or by remembering to update the driver.
Overall, CoH3 is struggling because of a lack of maps and slow pace of balance changes, among various other issues (clunky friend/invite system; should've just stuck with Steam's features exclusively). Community communication has been quite normal for Relic which can be described as too slow and with too little information which makes players even more frustrated. The glue holding the game together has been the four factions and optimization/stability. But this glue won't hold forever.