Is English easy?

Everyone seems to say that English is easy, as a UK native it’s impossible to recognise the difficulties of English until you are confronted with non natives trying to learn English.
As an English teacher in France I have come across many difficulties learners have, and through this experience I have drawn up a list of challenging points, and I have also developed these into E learning courses.
So what is difficult about English?
In my experience I would say the following themes can be issues:

N°1 Pronunciation vs Spelling – English spelling doesn’t not always reflect it’s pronunciation, it’s rules seem archaic and random, take for instance “read, read (past), head, lead, lead” (product).
Or “beard, bear”. Then there is word stress and “Schwas”, Comfort sounds like Kumfurt – “Table” sounds like TAY BUL yet “comfortable” sounds like KUM-FU-TU-BUL.
And of course Ship vs Sheep, do you need a shit or a sheet!?

N°2 Pronunciation – Contractions and abbreviations – I am going to call = Am gonna call, I will see you later = A’ll seeyuh latyah.
I want a bottle of water = Ah wanna bottul o wotuh OR Ah wanna bo’ul ‘o wo’uh!

N°3 Tenses – English doesn’t have as many verb variations as French for example, take the verb “BE”, we’ve got “be, am, is, are, were, was,” that’s basically it, but we use many tenses, even in spoken English, which is actually more complicated than in French, the average conversation could use : Present simple, Present continuous, Present perfect, Present Perfect Continuous, Past simple, Past continuous, Past perfect, Past Perfect Continuous, Future simple, Future-Going to, Future Perfect, Future Perfect Continuous, First Second and Third Conditionals.
Here are some examples
I go to work everyday (Present Simple)
I am going to work (Present Continuous)
I have been to work today (Present Perfect)
I have been working for 20 years (Present Perfect Continuous)
I went to work yesterday (Past Simple)
I was working last week (Past Continuous)
I had worked last year (Past Perfect)
I had been working before the Covid (Past Perfect Continuous)
I am going on holiday next week (Future programmed with GOING TO)
I will see what I can do (Future with WILL = not planned)
I will have been living in France 25 years next October (Future Perfect Continuous)
I will help you if I can (First Conditional)
I would help you if I could (Second Conditional)
I would have helped you If I had been available (Third Conditional)
So despite having only a few verb variations, we have at least 14 common verb tenses to express things.
For example I worked 10 years (Past Simple) is self explanatory that the period is finished.
I have worked for 10 years is self explanatory that it IS NOT finished yet.

N°4 Phrasal Verbs, natives love them, foreigners hate them! Get ON with someone, Fall OUT with someone, Pick someone UP, drop someone OFF etc,
Sometimes they are obvious, sometimes they are abstract.

N°5 Prepositions, another pet hate of non natives, get IN the car, get ON the bus, ON Monday, IN June, AT 10 o clock, IN the city, AT work etc.

Anyway so these are among other things that I have picked UP ON (!) and I have built courses based around explaining these principals.
What do you think? What is difficult about English?

Happy learning!