What you are experiencing are the growing pains of a new straight razor shaver.

Providing your 2 razors are shave ready the should eventually surpass or be at least just as good as the shavette. Focus on your angles and pressures. Make sure each stroke is deliberate and with purpose. Shorten your strokes and use you 'off hand' to stretch your skin.

Focus on WTG passes for now until you can get a DFS and then chase BBS.

If you have irritation immediately following your first pass its usually too much pressure. Try to ease up and it should get better.