I can't advise on your dose but ill tell you what went down with me:
About 2 months into humulin I, while I dropped in numbers (high 20s down to mid teens), just didn't drop enough, had an evening dose added too.
Fast forward another month (so 3 months total) and I was switched to long and short acting insulins as it still wasn't doing the job. I was offered mixed but firmly asked for them to be split so I could be more flexible for eating.
The 3 months was important as it ties in with the NHS holy grail flowchart.
😉
https://www.sign.ac.uk/assets/diabetes_algorithm.pdf
Note the 4th line treatment.
IF NOT REACHING TARGET AFTER 3−6 MONTHS, REVIEW ADHERENCE: THEN GUIDED BY PATIENT PROFILE ADD ADDITIONAL AGENT(S) FROM 3rd LINE OPTIONS (NEED SPECIALIST INPUT)
ADD PRANDIAL INSULIN OR SWITCH TO TWICE-DAILY MIXED BIPHASIC INSULIN
A lot depends on what your body can do. Humulin I if taken in morning has the profile to provide background insulin and has more of a peak than other background insulins which tend to be more even and last longer.
It is supposed to take some of the load off and let natural home grown insulin cover more of the meals with a little help.
It wasn't enough for me alone.
https://www.diabetes.org.uk/resourc...20of%20Leicester%20-%20Insulin%20Profiles.pdf
Please don't fret, your team sounds like they are monitoring you well and at least not leaving you fumbling in the dark.
I know its frustrating and you want things under control "NOW" but I haven't experienced much of them straying off the first link's flowchart and that timeline.
You might just need to keep going with Humulin I until you find the right dose and then it clicks or you might need to move onto a different regime.
The important thing is to keep monitoring levels and keep working with your team.
My dosing adjustment advice was 2 or 3 units at a time OR 10%, whatever is greater. So for a 50u dose it would be 5u increments. Might want to ask them if you can adjust a bit more at a time to get to the end result of being on the right dose a little quicker. (!!!please do ask your team first!!!).
I do understand the frustrations (been there and got the teeshirt)